Question 1

Are emulsifier OS and MS-1 harmful to the human body? Do they have an impact on the environment?

Accepted Answer

Emulsifier OS is hazardous with irritant effects on the human body, while emulsifier MS-1 is classified as a low-risk chemical; both should be prevented from directly entering water bodies and the environment. Effects on Human Health Emulsifier OS (tty Alcohol Polyoxyethylene Ether) Emulsifier OS has clear irritant hazards to the human body . According to the GHS classification criteria for chemicals, its hazard categories are Skin corrosion/irritation Category 2 and Serious eye damage/eye irritation Category 2 . Specific manifestations include: H315 Causes skin irritation, H319 Causes serious eye irritation. If accidentally contacted with the skin during operation, it may cause irritation reactions such as redness and itching; if splashed into the eyes, it may lead to severe discomfort and injury. In addition, inhalation of its vapor or mist may also cause respiratory irritation. Therefore, operators must wear chemical safety goggles and protective gloves to avoid direct contact with skin and eyes, and the workplace should maintain good ventilation. Emulsifier MS-1 (Octylphenol Polyoxyethylene Ether Maleate) According to current chemical classification standards, emulsifier MS-1 is not classified as hazardous and is a low-risk chemical . Under normal conditions, it has no significant acute toxicity or irritation to the human body. Small amounts ingested are usually harmless, and skin contact generally does not cause severe reactions. Even so, it is still recommended to follow basic chemical hygiene practices during operation, avoid prolonged skin contact, wash hands after operation, and prevent the formation and inhalation of product dust or mist. If discomfort occurs due to high concentration exposure, move the person to fresh air immediately. Environmental Impact The main potential environmental impact of both products lies in water pollution . Emulsifier OS and MS-1 are both surctants. If they enter water bodies in large quantities, they may reduce surce tension, affect the reoxygenation capacity of the water, and cause adverse effects on aquatic organisms (such as fish, algae, etc.). Surctants may also degrade slowly in the natural environment, placing a certain burden on the water ecosystem in the short term. According to the emergency handling guidelines in the database: In case of leakage of emulsifier OS, "it should be prevented from entering sewers, surce water, or groundwater systems"; for large spills of emulsifier MS-1, "the product should be prevented from entering waterways". The disposal of both products requires that they must not be directly discharged into the environment and must be handed over to qualified professional waste treatment companies for compliant disposal (such as incineration or landfill), following local and national environmental regulations. Currently, the database does not provide specific biodegradability data, aquatic toxicity data (such as LC50/EC50 values) or bioaccumulation data for the two products. For detailed environmental risk assessment, it is recommended to consult the complete Safety Data Sheet (SDS) or contact Guoli Chemical Technology Support for supplementary information. Safe Operation Recommendations Emulsifier OS: Must wear chemical safety goggles, protective gloves, and work clothes during operation; avoid inhaling vapor or mist; maintain good ventilation in the workplace, use explosion-proof ventilation systems. Emulsifier MS-1: Although a low-risk product, it is still recommended to maintain good ventilation, wash hands after operation, and avoid prolonged skin contact. Common to both: Strictly prohibit discharging waste liquid directly into sewers or natural water bodies; collect leaks with inert absorbent materials and seal for disposal; waste treatment must be entrusted to qualified professional institutions, following the "first in, first out" inventory principle to avoid product expiration. Notes The above information is based on the safety instructions provided by the Guoli Chemical product database. For emulsifier OS, special caution is needed regarding its severe eye irritation—if splashed into the eyes, immediately open the eyelids and rinse with plenty of running water for at least 15 minutes, and seek medical attention immediately. Both products may produce irritating or toxic gases when heated and decomposed in a fire; firefighters must wear self-contained positive pressure breathing apparatus. For complete toxicological data, ecotoxicological data, and detailed SDS, please contact the Technical Support Department of Haian Guoli Chemical Co., Ltd.

Question 2

What should I do if problems occur during the use of emulsifiers OS and MS-1? How to obtain technical support?

Accepted Answer

When encountering problems with the use of emulsifiers OS/MS-1, first identify the cause based on specific symptoms, then adjust process parameters accordingly. At the same time, you can directly contact the technical team of Guoli Chemical for professional support. Detailed Explanation Problems that may arise during the practical application of emulsifier OS (Sodium secondary alkyl sulfonate, CAS No.: 68439-50-9) and emulsifier MS-1 (Octylphenol polyoxyethylene ether maleate) mainly include insufficient emulsion stability, formulation stratification, poor dispersion effect, and poor compatibility with specific technical materials. Most problems are not due to quality defects of the product itself, but rather caused by formulation design, process conditions, or storage methods not matching the product characteristics. When encountering usage problems, it is recommended to adopt the "Three-Step Troubleshooting Method": First, check whether the product appearance and quality indicators are normal (OS should be a light yellow to yellow-brown oily liquid, MS-1 a brown-red viscous liquid); second, review key parameters in the formulation system such as emulsifier dosage, oil-water ratio, water hardness, and pH value; third, investigate the operating process conditions, including emulsification temperature, shear rate and time, feeding sequence, etc. If the problem persists after basic troubleshooting, immediately contact the Application Technology Department of Guoli Chemical, providing the batch number, problem description, and samples for rapid diagnosis by technical personnel. Common formulation-related problems and countermeasures include: Emulsifiable concentrate (EC) appearing turbid or precipitating — It is recommended to increase the OS dosage to 6%-10%, or compound it with MS-1 at a ratio of 3:1 to 5:1 to enhance system stability through synergistic effects; Emulsion in water (EW) delaminating or breaking — Check if water hardness is too high (OS has good hard water resistance, but extremely hard water may still affect emulsification), while appropriately extending high-shear emulsification time and controlling emulsification temperature in the range of 30-50°C; Suspension concentrate (SC) showing sedimentation or caking — Add 0.5%-2% of MS-1 as a wetting and dispersing auxiliary, combined with OS to improve the suspension stability of solid particles. Common Problem Troubleshooting Guide Problem Phenomenon Possible Cause Solution Poor emulsion stability, stratification after standing Low emulsifier dosage; Imbalanced oil phase\/water phase ratio; Excessive water hardness Increase emulsifier ratio to 6%-12%; Adjust oil-water ratio; Use softened or deionized water Poor compatibility between formulation and technical material Specific polarity of technical material; Antagonism from compounding multiple active ingredients Switch to a combined OS and MS-1 formulation (recommended ratio 3:1~5:1); Add appropriate amount of polar co-solvent Flocculent material or precipitation in diluted solution Excessive hardness of dilution water; Insufficient emulsifier concentration due to high dilution ratio Use softened water for dilution; Appropriately increase emulsifier ratio without affecting efficacy Product thickens or solidifies at low temperature Viscosity of OS increases significantly at low temperatures (pour point approx. 10-30°C, depending on EO number) Preheat to 25-40°C and stir evenly before use; Can be used normally without affecting product performance Excessive foaming affects filling Both OS and MS-1 are medium-foaming surctants Add trace amount of defoamer (dimethyl silicone oil type); Reduce stirring speed; Use vacuum filling Poor spreading of spray liquid on leaf surce Wetting and spreading performance of MS-1 not fully utilized; High surce tension of diluted solution Add 0.05%-0.2% MS-1 as tank mix adjuvant; Ensure dilution liquid pH is between 5.5-7.5 Application Recommendations Optimal Usage Process Parameters: For emulsifier OS in pesticide emulsifiable concentrate processing, the recommended dosage is 6%-12% of the technical material amount, emulsification temperature controlled at 30-50°C, and stirring at medium-high shear rate (3000-5000 rpm) for 15-30 minutes achieves the best emulsification effect. For emulsifier MS-1 in microemulsion formulations, the recommended dosage is 5%-8%, and it can be compounded with OS to enhance overall performance, with a cloud point of approximately 65-75°C (1% aqueous solution). Processing temperature should not exceed 60°C to avoid affecting its nonionic surctant properties. Formulation Compounding Recommendations: When using OS or MS-1 alone yields unsatisctory results, a binary or ternary compounding scheme is recommended. OS provides excellent initial emulsifying power and electrolyte tolerance, while MS-1 contributes outstanding spreading and long-term stability. When compounding the two, the HLB values complement each other (OS itself has an HLB value of about 12-14), covering a wider range of oil phase systems. For special formulations containing polar solvents, a small amount of a high-HLB co-emulsifier can be added for fine-tuning. How to Obtain Technical Support Haian Guoli Chemical Co., Ltd. provides comprehensive technical support services for all users. You can obtain professional assistance through the following channels: Phone Technical Support: Call the official technical service hotline of Guoli Chemical (see the company website or product packaging label). Senior application engineers will answer directly on working days. Sample Submission for Analysis: Mail problematic batch samples (at least 200 ml) along with usage instructions to the company's technology center for complete physicochemical index testing and formulation diagnosis. On-site Technical Service: For major application projects or batch issues, you can request technicians to visit for process guidance and on-site debugging. Technical Data Request: Obtain product TDS (Technical Data Sheet), MSDS (Material Safety Data Sheet), and targeted application formulation suggestions. Pre-sales Formulation Development Support: Obtain formulation screening, emulsifier selection, and ratio optimization services even during the new product development phase. Please Prepare the Following Information Before Contacting Technical Support Product batch number (found on the packaging drum label) Specific application field and formulation type (e.g., EC, EW, SC, etc.) Detailed description of the problem phenomenon (photos or videos preferred) Composition and proportions of each component in the formulation (technical material names can be omitted, but provide polarity and solvent type) Operating process conditions (temperature, stirring method and time, feeding sequence) Water quality conditions (hardness, pH value, water temperature) Emergency Safety Handling Reminder In case of accidental contact during use, refer to the product safety instructions for immediate handling: Emulsifier OS is irritating to skin and eyes (GHS classification: Skin irritation category 2, Eye irritation category 2). In case of contact, immediately flush with plenty of running water for at least 15 minutes and seek medical attention; Emulsifier MS-1 is a low-risk chemical (no hazard classification), but it is still recommended to wear protective gloves and goggles during routine operations and maintain good ventilation.

Question 3

How to purchase Emulsifier OS and MS-1? What is the minimum order quantity?

Accepted Answer

Emulsifier OS and MS-1 are regular mass-production products, available in multiple packaging specifications. For specific pricing and minimum order quantity (MOQ), please contact the sales team of Guoli Chemical for real-time quotations. Detailed Description Emulsifier OS (tty alcohol polyoxyethylene ether) and Emulsifier MS-1 (Octylphenol polyoxyethylene ether maleate) from Hainan County Guoli Chemical Co., Ltd. are both regular stock products, available for supply to domestic and international customers. According to the product database, the standard packaging specifications currently offered are: 50kg plastic drum, 200kg plastic drum, and IBC tote, catering to different procurement needs from small-scale sample testing to industrial mass production. It should be noted that the pricing of chemical raw materials is significantly influenced by fluctuations in upstream raw material costs (e.g., ethylene oxide, tty alcohols, alkylphenols, etc.), and ctors such as procurement quantity (sample/pilot/ton-level/truckload), payment method, and transportation conditions also affect the final quotation. Therefore, no fixed unit price is disclosed in the database, and it is marked as "The above prices are for reference only; actual prices please contact the sales team for the latest quote", with the update time being June 2026. It is recommended that based on your specific needs (pesticide formulation processing, textile auxiliaries compounding, or industrial cleaning applications, etc.), you confirm in advance the required product type (OS or MS-1), estimated annual usage, and initial trial purchase quantity so that the sales team can match the optimal business solution and technical support services for you. Procurement Contact Guide Best channels to obtain official quotations: Phone Inquiry: Call Guoli Chemical's official sales hotline to directly contact a regional manager (available on the official website). Official Website Message: Visit the official website of Guoli Chemical, submit product requirements through the online inquiry form, and customer service typically responds within 1 business day. Email Inquiry: Send an email to the sales department's official email address, including company name, contact person, product name, estimated procurement quantity, and application field to expedite the quotation process. On-site Visit: For long-term large-scale cooperation, you are welcome to visit the production base of Guoli Chemical in Hainan County for on-site inspection and ce-to-ce negotiations on annual framework agreements. Technical Parameters (Summary) ItemEmulsifier OSEmulsifier MS-1 Chemical Nametty alcohol polyoxyethylene etherOctylphenol polyoxyethylene ether maleate CAS No.68439-50-9 Appearance (25°C)White to slightly yellow pasteBrownish red viscous liquid Ionic TypeNonionicNonionic/Anionic HLB Value12-14 Active Content≥99% pH Value (1% Aqueous Solution)5.5~7.5 Packaging Specification50kg plastic drum / 200kg plastic drum / IBC tote Precautions Emulsifier OS has GHS hazard categories: Skin corrosion/irritation Category 2, Serious eye damage/eye irritation Category 2. Protective gloves and goggles must be worn during operation; MS-1 has no hazard classification, but basic chemical hygiene practices are still recommended. There is no fixed MOQ (minimum order quantity) in the database; typically, single drums (50kg/200kg) are sold as a starting quantity, and tote and above are regular starting quantities for large customers. The exact quantity is subject to the sales contract. The above prices are reference prices from the database (updated on June 10, 2026), not real transaction prices. Please be sure to contact the sales team to obtain a valid quotation for the day.

Question 4

Are emulsifiers OS and MS-1 compliant with environmental requirements? Can a test report be provided?

Accepted Answer

Emulsifiers OS and MS-1, when used in compliance and properly disposed of, meet current environmental regulations. However, for specific test reports, you need to contact Guoli Chemical directly. Detailed Explanation From the perspective of product composition and structure, emulsifier OS (tty alcohol polyoxyethylene ether) uses natural tty alcohols as starting materials and has good biodegradability; emulsifier MS-1 (polyglycerol tty acid ester/maleate derivative) is based on glycerol and tty acid structures and also lls within the category of environmentally friendly raw materials. Both are non-persistent chemicals and are not prone to long-term accumulation in the environment. According to data from Guoli Chemical, both products have clear environmental compliance requirements for waste disposal: For emulsifier OS, it is required to "follow local, regional, and national environmental regulations" and "hand over to a qualified professional waste treatment company for incineration or landfill disposal"; for emulsifier MS-1, it is explicitly required "not to be directly discharged into the environment" and must be "sent to an approved waste treatment cility for disposal." This indicates that the products themselves meet environmental standards in the production stage; the key lies in the user's proper end-of-life waste management. Currently, the database does not include the original third-party environmental test reports such as SGS, ROHS, or biodegradation rate for these products. It is recommended that you directly contact the sales or quality inspection department of Guoli Chemical to obtain the latest test reports for the environmental standards you require (e.g., REACH, China's pesticide environmental requirements, etc.). Key Points for Environmental Compliance ProductEnvironmentally Relevant PropertiesWaste Disposal Requirements Emulsifier OS (tty alcohol polyoxyethylene ether)Non-ionic, biodegradable; GHS classification: skin/eye irritantDispose of by incineration/landfill through qualified company according to law; do not discharge into environment Emulsifier MS-1 (polyglycerol tty acid ester)GHS no hazard classification, low risk; renewable raw materialsDo not discharge directly; send to approved waste treatment cility Suggestions for Obtaining Test Reports Contact Channel: It is recommended to formally apply for product environmental test reports from the quality inspection department through the official website or sales hotline of Hai'an Guoli Chemical Co., Ltd. Parameters to Specify: When applying, please specify the environmental standards you are concerned about, such as biodegradation rate (OECD 301 series), heavy metal content, VOC emissions, REACH compliance statement, etc. Reference Data Already in the Database: The heavy metal content (as Pb) of this product is ≤10 mg/kg, arsenic ≤2 mg/kg, both within conventional environmental limits. Notes Although the products themselves meet environmental design requirements, it is still necessary to strictly control leaks and spills during use to prevent entry into water bodies. Different countries and regions have different environmental registration requirements for pesticide adjuvants; for export purposes, please confirm the regulations of the target market in advance.

Question 5

What are the advantages of emulsifier OS, MS-1 compared to other similar products?

Accepted Answer

Emulsifier OS/MS-1, with its unique anionic-nonionic synergistic structure and high active content (≥99%), significantly outperforms conventional single nonionic emulsifiers in terms of hard water resistance, electrolyte stability, pesticide formulation compatibility, and safety. Detailed Explanation Compared with commonly used single nonionic emulsifiers on the market (such as pure AEO series, 600# series, Tween series, etc.), the core advantage of emulsifier OS/MS-1 lies in its synergistic combination design of anionic and nonionic structures. The OS component (sodium secondary alkane sulfonate), as an anionic surctant, imparts excellent hard water resistance and electrolyte stability to the product—characteristics that are difficult to achieve simultaneously with conventional nonionic emulsifiers. When pesticide formulations are diluted with hard water or contain inorganic salt active ingredients, the OS component effectively prevents emulsion breaking and layering caused by calcium/magnesium ions or electrolyte shock, a practical advantage that pure nonionic products cannot match. The MS-1 component (octylphenol polyoxyethylene ether maleate) combines nonionic emulsifying and anionic hydrophilic properties, exhibiting extremely excellent compatibility with various pesticide technical materials and solvents, making it adaptable to multiple oil phase systems. From a safety and environmental perspective, the MS-1 component has no GHS hazard classification and is a low-risk chemical, giving it a clear differentiating advantage among pesticide emulsifiers. Traditional phenolic ether emulsifiers (such as octylphenol polyoxyethylene ether OP series) are cing increasingly stringent restrictions worldwide due to environmental hormone controversies; whereas MS-1, through maleate modification, significantly reduces toxicological risks while maintaining excellent emulsifying performance, aligning with the trend of green pesticide formulations. Additionally, the OS/MS-1 series products have an active content ≥99%, free alcohol ≤2.0%, heavy metals ≤10 mg/kg, and arsenic ≤2 mg/kg, high purity and strict impurity control, which helps improve the quality stability and shelf life of end-use pesticide formulations. In terms of application breadth, the OS/MS-1 series demonstrates full formulation coverage capability—capable of meeting the emulsification and dispersion needs of the four mainstream pesticide formulation types: emulsifiable concentrate (EC), emulsion in water (EW), suspension concentrate (SC), and microemulsion (ME). This "one agent, multiple uses" feature allows formulation manucturers to switch between formulations without frequently changing emulsifier suppliers, simplifying supply chain management and reducing the complexity of formulation optimization. With a cloud point range of approximately 65-75°C for the MS-1 component and moderate foam characteristics, the product does not cause excessive foaming issues during field dilution and spraying, offering a better operational experience compared to high-foaming emulsifier products. Technical Parameter Comparison Comparison Dimension Emulsifier OS/MS-1 Conventional Nonionic Emulsifier (e.g., pure AEO, Tween series, etc.) Ionic Type Nonionic/Anionic synergistic system Single nonionic type Hard Water Resistance Excellent (provided by OS anionic component) General, prone to precipitation or turbidity in hard water Electrolyte Stability Good Poor, significant salting-out effect Active Content (Data source: Guoli Chemical Database) ≥99% Typically 50%-99% varying Free Alcohol Content (Data source: Guoli Chemical Database) ≤2.0% Some products may reach 3%-5% HLB Value (Data source: Guoli Chemical Database) 12-14 Varies with EO number Cloud Point (

Question 6

How to store emulsifier OS and MS-1? How long is the shelf life?

Accepted Answer

Emulsifiers OS and MS-1 should be stored sealed in a cool, dry, and well-ventilated warehouse, away from fire sources and strong oxidants. There is no official shelf life data in the database. Typically, the shelf life of such products under proper storage conditions is 12-24 months. Detailed Explanation According to the safety instructions of Guoli Chemical products, Emulsifier OS (Sodium sec-alkyl sulfonate) and Emulsifier MS-1 (Octylphenol polyoxyethylene ether maleate) have generally consistent storage requirements. They must be stored in a dedicated cool, dry, and well-ventilated warehouse, with containers kept sealed to prevent moisture and contamination. Both are classified as non-hazardous goods, safe for transport, but attention should be paid to separate storage from incompatible substances (such as strong oxidants and strong acids), and mixing is strictly prohibited. Since Emulsifier OS is classified as GHS skin corrosion/irritation category 2, the storage area should be additionally equipped with spill collection materials (such as sand or inert absorbents), and follow the "first-in, first-out" inventory management principle. Emulsifier MS-1 has no hazard classification and low risk, but still needs to avoid extreme temperatures and direct sunlight. Both products may decompose and generate irritating gases when heated in a fire, so the storage environment must be away from fire and heat sources. Regarding the shelf life, there is no official shelf life data provided in the Guoli Chemical product database this time. According to the industry standard for nonionic/anionic surctants, under strict compliance with the above storage conditions and keeping the original sealed packaging, the recommended usage period for such products is generally 12 to 24 months. It is recommended that users refer to the product packaging or Certificate of Analysis (COA) for the exact date. After opening, try to use it within 6 months and regularly check for changes in appearance and performance. Technical Parameters Storage ParameterEmulsifier OSEmulsifier MS-1 Storage temperatureCool environment (recommended ≤30°C)Cool environment, avoid extreme temperatures Humidity requirementDry environment, prevent moistureDry environment Ventilation conditionWell-ventilated dedicated warehouseWell-ventilated area Sealing requirementKeep container sealedKeep container tightly closed Incompatible materialsOxidizers, strong acidsStrong oxidizers GHS hazard classificationSkin corrosion/irritation Category 2; Eye damage/irritation Category 2No hazard classification Transport classificationNon-dangerous goodsNon-dangerous goods Shelf life (official data)No data availableNo data available Application Recommendations Batch Withdrawal: Follow the "first-in, first-out" principle to avoid overstock and expiration. Immediately reseal the container after each withdrawal to reduce exposure to air and moisture. Opening Management: After opening, it is recommended to mark the opening date on the container label and prioritize usage within 6 months to avoid performance degradation due to moisture absorption or oxidation. Regular Inspection: Check the product appearance (color, transparency, layering or sedimentation) every 3 months. If yellow-brown deepening, turbidity, or off-odor occurs, discontinue use and perform quality verification. Repackaging Recommendation: If repackaging is needed, use dry and clean HDPE or containers with anti-corrosion lining. Iron or aluminum containers are strictly prohibited for long-term storage. Precautions Emulsifier OS is irritating to skin and eyes (H315/H319). Operators should wear chemical safety goggles and protective gloves when handling. In case of leakage, collect with inert absorbent materials (sand, vermiculite) to prevent entering drains or surce water systems. Both products must be disposed of by qualified professional waste treatment companies and must not be discharged directly into the environment.

Question 7

What safety precautions should be taken when using emulsifiers OS and MS-1?

Accepted Answer

Emulsifier OS has clear irritating risks (H315/H319), and strict protective measures must be taken during operation; emulsifier MS-1 is a low-risk chemical, but basic chemical hygiene practices should still be followed. Detailed Explanation The safety risk levels of emulsifier OS and emulsifier MS-1 are significantly different. The GHS classification of emulsifier OS includes skin corrosion/irritation Category 2 and serious eye damage/eye irritation Category 2, corresponding to hazard statements H315 (causes skin irritation) and H319 (causes serious eye irritation), making it a key object requiring protection during operation. Emulsifier MS-1, according to current chemical classification standards, is a non-hazardous product with relatively low overall risk, but good operating habits are still recommended. Both products are classified as non-dangerous goods in terms of transportation, providing significant convenience for logistics. However, it should be noted that although neither is flammable, they may still produce irritating or toxic gases when thermally decomposed in a fire. Firefighters must wear self-contained positive-pressure breathing apparatus and full-body fireproof suits when extinguishing a fire. The core principle for daily operations is: Chemical safety goggles and protective gloves must be worn throughout the process when handling emulsifier OS, avoiding any form of direct contact; although emulsifier MS-1 has a lower risk, prolonged skin contact and inhalation of droplets should still be avoided, and hands should be thoroughly washed after operation. Storage of both products requires a cool, dry, and well-ventilated environment, with containers kept sealed and away from incompatible substances such as strong oxidizers. Safety Comparison Quick Reference Table Safety ItemEmulsifier OSEmulsifier MS-1 GHS Hazard CategorySkin corrosion/irritation Category 2; Serious eye damage/eye irritation Category 2Non-hazardous Hazard StatementH315 Causes skin irritation; H319 Causes serious eye irritationNone Transport ClassificationNon-dangerous goodsNon-dangerous goods Protection LevelMust wear chemical safety goggles, protective gloves, and work clothesConventional chemical handling protection is sufficient FlammabilityNon-flammable, but produces irritating/toxic gases upon thermal decompositionNon-flammable, but produces irritating fumes upon thermal decomposition Application Recommendations Key points for handling emulsifier OS: In the processing of pesticide emulsifiable concentrates, water emulsions, and other formulations, as well as in the compounding of textile printing and dyeing auxiliaries, operators should undergo specialized training and strictly follow operating procedures. The workplace must maintain good ventilation, and explosion-proof ventilation systems should be used. Eating, drinking, or smoking is prohibited during operation. After operation, thoroughly wash hands and any exposed skin areas. The work area should be equipped with leak collection materials, such as sand or inert absorbents. Key points for handling emulsifier MS-1: Although it is classified as non-hazardous, its characteristics as a brown-red viscous liquid mean that it is not easy to clean after contact. It is recommended to still wear gloves during operation. When used in large quantities in the construction of pesticide microemulsions, water emulsions, or textile finishing processes, inhalation of product droplets should be avoided, and the work area should be kept ventilated. If a small leak occurs, collect and place it in a waste container; residues can be rinsed with water. Emergency Treatment Precautions Skin contact (OS): Immediately remove contaminated clothing and thoroughly rinse with plenty of running water and soap for at least 15 minutes. Seek medical attention if irritation persists. Skin contact (MS-1): Wash with soap and water; seek medical attention if discomfort or irritation occurs. Eye contact (OS): Immediately open the eyelids and rinse with plenty of running water or saline for at least 15 minutes; seek immediate medical attention – this is the most critical first aid measure. Eye contact (MS-1): Rinse with plenty of water for several minutes; seek medical attention if irritation persists. Ingestion (OS): Rinse the mouth with water, do not induce vomiting, seek medical attention immediately and show the product label. Ingestion (MS-1): Small amounts generally harmless; if large amount, rinse mouth and consult a doctor. Leak handling: For large leaks of both products, prevent them from entering sewers, surce water, or groundwater systems. For OS, use an explosion-proof pump to transfer to a dedicated collector; for MS-1, collect and place in a waste container. Waste disposal: Both must comply with local and national environmental regulations and be disposed of by a qualified professional waste treatment company. Do not discharge directly into the environment.

Question 8

How to use emulsifiers OS and MS-1? What is the recommended dosage?

Accepted Answer

The usage and recommended dosage of Emulsifier OS and MS-1 vary depending on the specific formulation, typically ranging from 1% to 15% of the total formulation weight, and the optimal dosage should be determined through experimental optimization. Detailed explanation Emulsifier OS (Sodium sec-alkyl sulfonate) and Emulsifier MS-1 (Octylphenol polyoxyethylene ether maleate) are two non-ionic/anionic surctants launched by Guoli Chemical, widely used in pesticide formulation processing and textile printing and dyeing fields. They can be used alone or in combination to achieve synergistic effects. When used, they are typically mixed uniformly with the technical concentrate and solvent during the oil phase preparation, and then emulsified with the water phase; or added directly to the system during production for homogeneous emulsification. Emulsifier OS is known for its strong emulsifying power and excellent wetting and penetration properties, especially suitable for scenarios requiring rapid formation of stable emulsion systems; Emulsifier MS-1 is renowned for its excellent comprehensive emulsifying performance and good compatibility with various pesticide technical concentrates and solvents, particularly suitable for multiple oil phase systems. In practical applications, the two can be flexibly selected or used in combination based on formulation type, technical concentrate characteristics, water hardness, and other ctors. It should be noted that the following dosage data are industry-wide recommended ranges (the database lacks specific dosage specifications for this product), and the optimal dosage in actual production must be optimized through orthogonal experiments or gradient tests based on the type of technical concentrate, solvent system, water quality conditions, and target formulation performance. Application suggestions Recommended dosage by formulation type (reference range) Formulation typeRecommended emulsifierRecommended dosage (percentage of total formulation weight)Application points Emulsifiable concentrate (EC)OS or MS-13%~10%First dissolve in the oil phase, then add water for dilution and emulsification; OS provides st emulsification, MS-1 is compatible with multiple oil phases Emulsion in water (EW)Primarily MS-12%~6%Add to the oil phase before homogenization, combined with high-speed shearing or high-pressure homogenization process Suspension concentrate (SC)Primarily OS1%~5%Add before wet grinding to improve wetting and dispersion of technical concentrate particles, preventing sedimentation and caking Microemulsion (ME)MS-1 or OS+MS-1 combination5%~15%Requires co-emulsifiers (e.g., lower alcohols) to synergistically build a thermodynamically stable system Tank-mix adjuvantOS or MS-10.05%~0.5% (concentration after dilution)Mix immediately before use; first add to pesticide dilution and stir evenly Textile printing and dyeing auxiliaryOS or MS-10.5%~5% (working solution concentration)Adjust dosage according to specific process (scouring, dyeing, finishing) Operation procedure Weighing and measuring: Accurately weigh the emulsifier according to the formulation ratio, using an electronic balance with a precision of at least 0.1g. Mixing sequence: For EC/ME systems, first mix the emulsifier with the technical concentrate and solvent thoroughly (can be aided by heating at 40~60°C to promote dissolution), then slowly add the water phase for emulsification; for EW systems, after adding the emulsifier to the oil phase, gradually add the water phase under high-speed shearing (3000~5000 rpm). Homogenization process: For EW and ME, it is recommended to use a high-pressure homogenizer (pressure 20~50 MPa) for 1~3 passes to achieve a narrower particle size distribution and better storage stability. Quality testing: After preparing the formulation, test emulsion stability (refer to GB/T 1603 standard), cold storage stability (0±2°C, 7 days), and heat storage stability (54±2°C, 14 days). Suggestion for combining OS and MS-1 When a single emulsifier cannot meet the emulsification needs of complex oil phase systems, it is recommended to use OS and MS-1 in combination. The typical mass ratio is OS:MS-1 = 1:1 to 3:1, with the total dosage remaining within the recommended range above. This combination can achieve both rapid emulsification and long-term stability, especially suitable for formulations containing multiple technical concentrates. Precautions Emulsifier OS is irritating to skin (H315) and may cause serious eye irritation (H319). Must wear chemical safety goggles and protective gloves during operation to avoid direct contact with eyes and skin. Emulsifier MS-1 has no hazard classification, but it is still recommended to maintain good ventilation, wash hands after operation, and avoid prolonged skin contact. Both products should be stored in a cool, dry, well-ventilated warehouse, with containers sealed, away from fire sources and strong oxidizers. The quality of technical concentrates and solvents from different batches may affect the optimal dosage of emulsifiers. It is recommended to perform small-scale testing for verification before each batch of formal production. If the system experiences layering or sedimentation, try appropriately increasing the emulsifier dosage or adjusting the OS/MS-1 ratio, rather than simply increasing the amount. Waste formulations and packaging should be disposed of by qualified professional waste treatment companies in accordance with local environmental regulations, and must not be discharged directly into the environment.

Question 9

In which industries and processes are emulsifiers OS and MS-1 mainly used?

Accepted Answer

Emulsifiers OS and MS-1 are mainly used in two core industries: pesticide formulation processing and textile printing and dyeing, covering various formulation processes such as emulsifiable concentrate (EC), emulsion in water (EW), suspension concentrate (SC), and microemulsion (ME). Detailed Description Emulsifier OS (Sodium secondary alkyl sulfonate) and emulsifier MS-1 (Octylphenol polyoxyethylene ether maleate) are two non-ionic/anionic surctant products launched by Guoli Chemical. Both have excellent emulsifying, wetting, and dispersing capabilities, occupying a core position in the field of pesticide formulation processing, and are also widely used in fine chemical fields such as textile printing and dyeing, industrial cleaning, and emulsion polymerization. Emulsifier OS is known for its strong emulsifying power, rapid wetting and penetration, and outstanding dispersion properties, with good stability to hard water and electrolytes, making it particularly suitable for systems that require rapid formation of stable emulsions. Emulsifier MS-1 features excellent comprehensive emulsifying performance, outstanding wetting and spreading properties, and excellent compatibility with various pesticide technical materials and solvents, adapting to a variety of oil phase systems and helping to delay formulation stratification. In practical applications, the two products are often used together to achieve synergistic effects, significantly improving the stability, dispersibility, and efficacy of pesticide formulations, while reducing the amount of organic solvent used, in line with the development trend of green pesticide formulations. Main Application Industries and Processes IndustryProcess TypeApplicable ProductCore Function Pesticide Formulation ProcessingEmulsifiable concentrate (EC) processingOS / MS-1Acts as a high-efficiency emulsifier, enabling rapid dissolution and emulsification of the pesticide technical material, improving the stability and dispersibility of the EC, and ensuring uniform adhesion of the spray liquid to the target Emulsion in water (EW) preparationOS / MS-1Provides excellent emulsification and stabilization, allowing the oil phase to disperse uniformly as fine droplets in the water phase, preventing stratification and demulsification, extending shelf life, and reducing organic solvent usage Suspension concentrate (SC) systemOS / MS-1Improves wetting and dispersion of solid technical material particles in water, prevents sedimentation and agglomeration, optimizes fluidity for easy dilution and mixing Microemulsion (ME) constructionOS / MS-1cilitates formation of thermodynamically stable transparent or translucent microemulsions under low-energy emulsification conditions, enhancing transdermal penetration and systemic translocation of the formulation Compounding and tank-mix adjuvantOS / MS-1Good compatibility when formulating multiple active ingredients, reducing physicochemical antagonism between technical materials, improving spreading and adhesion of spray droplets on leaf surces Textile Printing and DyeingCompounding of pretreatment and finishing auxiliariesOS / MS-1Used as components in penetrants, leveling agents, softeners, etc., to improve textile processing performance Fine ChemicalsIndustrial cleaning and emulsion polymerizationOSUtilizes emulsifying, dispersing, and penetrating capabilities in industrial cleaner formulations and emulsion polymerization systems Application Suggestions In the formulation of pesticide emulsifiable concentrates and emulsions in water, it is recommended to compound emulsifier OS and MS-1 in an appropriate ratio to achieve synergistic effects. Typically, OS provides rapid emulsification and strong penetration, while MS-1 enhances long-term stability and spreading performance. The specific ratio should be adjusted according to the type of pesticide technical material, oil phase system, and formulation target, and it is recommended to determine the optimal dosage through small-scale trials. In suspension concentrate systems, the two products can be used as wetting and dispersing agents to effectively improve the suspension state of solid technical material particles in water, prevent sedimentation and agglomeration, and optimize the fluidity of the formulation. In the construction of microemulsions, they can assist in forming thermodynamically stable transparent or translucent microemulsions under low-energy emulsification conditions, enhancing transdermal penetration and systemic translocation of the formulation. Precautions Emulsifier OS is classified as GHS Skin Irritant Category 2 and Serious Eye Irritation Category 2 (H315/H319). Chemical safety goggles and protective gloves must be worn during operation. Avoid direct contact with skin and eyes, and maintain good ventilation in the workplace. Emulsifier MS-1 has no GHS hazard classification, but it is still recommended to follow basic chemical hygiene practices during operation, wash hands after handling, and avoid generating and inhaling product dust or mist. Both products should be stored in a cool, dry, well-ventilated warehouse, with containers kept sealed, away from fire and heat sources, and stored separately from incompatible substances such as strong oxidizers. Specific application formulations and dosages should be determined through experiments based on actual process conditions. It is recommended to communicate with the Guoli Chemical technical support team for targeted solutions.

Question 10

What are the physicochemical technical parameters of emulsifiers OS and MS-1?

Accepted Answer

Emulsifiers OS and MS-1 are two complementary nonionic surctants. Their physicochemical parameters cover more than 20 core indicators including HLB value, surce tension, cloud point, and viscosity, showing excellent overall performance and suitability for various formulation systems such as pesticide emulsifiable concentrates and emulsion concentrates. Detailed Description Emulsifier OS (chemical name: Sodium sec-alkyl sulfonate, CAS No.: 68439-50-9) appears as a light yellow to yellowish brown oily liquid. It is a nonionic/anionic mixed surctant with an HLB value of 12-14. It exhibits excellent emulsifying power, wetting penetration, and dispersibility, with good hard water resistance and electrolyte stability. Emulsifier MS-1 (chemical name: Octylphenol polyoxyethylene ether maleate) appears as a reddish brown viscous liquid. It has excellent comprehensive emulsifying properties, outstanding wetting and spreading performance, and good compatibility with various pesticide active ingredients and solvents. Its cloud point is approximately 65-75°C (1% aqueous solution). Both products have an active content of ≥99%. The pH value of a 1% aqueous solution is between 5.5 and 7.5, neutral to weakly acidic, with little impact on the pH of the formulation system. The surce tension is approximately 30-35 mN\/m (25°C), and the critical micelle concentration (CMC) is approximately 1×10⁻⁴ to 1×10⁻³ mol\/L, indicating high surce activity efficiency and effective intercial tension reduction at lower concentrations. The iodine value is approximately 20-40 g I₂\/100g, and the degree of unsaturation is approximately 0.8-1.6 mol\/kg, with good chemical stability and stable storage at room temperature. From an application perspective, OS has no cloud point (weak nonionic characteristics), making it suitable for use over a wide temperature range. MS-1 has a cloud point of 65-75°C, so attention must be paid to phase behavior changes at high temperatures. The penetration time of both is approximately 5-15 seconds (canvas disc method), with moderate foam and good alkali resistance, showing good compatibility in pesticide compounding. The flash point is >150°C (closed cup), and the product is classified as non-dangerous goods for transportation. However, OS is irritating to skin and eyes (H315\/H319), so protective equipment should be worn during handling. Technical Parameters Parameter ItemEmulsifier OSEmulsifier MS-1 CAS No.68439-50-9 Full Chemical NameC12-14 tty alcohol polyoxyethylene ether Molecular FormulaRO(CH₂CH₂O)nH (R=C12-14 alkyl, n=5-15) Molecular WeightApproximately 350-800 g\/mol (depending on EO adduction number) Ionic TypeNonionic Appearance (25°C)Light yellow to yellowish brown oily liquidReddish brown viscous liquid Active Content≥99% (solid content ≥99%) HLB Value12-14 pH Value (1% Aqueous Solution)5.5-7.5 pH Value (5% Aqueous Solution)5.5-7.5 Cloud PointNo cloud point (weak nonionic characteristics)Approximately 65-75°C (1% aqueous solution) Density (25°C)Approximately 0.95-1.05 g\/cm³ Kinematic Viscosity (25°C)Approximately 50-200 mm²\/s Low Shear Viscosity (25°C)Approximately 200-800 mm²\/s Surce Tension (1% Aqueous Solution, 25°C)Approximately 30-35 mN\/m Critical Micelle Concentration (CMC)Approximately 1×10⁻⁴ to 1×10⁻³ mol\/L Refractive Index (25°C)<td

Property	Value
CAS No.	68439-50-9
Molecular Formula	RO(CH₂CH₂O)nH (R=C12-14alkyl, n=5-15)
Appearance	Pale yellow to brown viscous liquid
Ionic Type	Nonionic
Avg. Molecular Weight	Approx. 350-800 g/mol (varies withEOaddition number)
Cloud Point	MS-1 cloud point: ~65-75°C (1% aq. soln.); OS: no cloud point
Active Content	≥99
pH Value(1%)	5.5~7.5
pH Value(5%)	5.5~7.5
Iodine Value	~20-40 g I₂/100g
Solubility	Dispersible in water
Surface Tension	~30-35 mN/m (1%aq. soln., 25°C)
CMC	~1×10⁻⁴to1×10⁻³ mol/L
Acid Value	≤1.0
Saponification Value	~50-100 mg KOH/g (MS-1 component)
Hydroxyl Value	~80-160 mg KOH/g
Moisture	≤1.0
Density	~0.95-1.05 g/cm³ (25°C)
Kinematic Viscosity	~50-200 mm²/s (25°C)
Refractive Index	~1.46-1.48 (25°C)
Flash Point	>150°C (closed cup)
Hygroscopicity	Slightly hygroscopic
Chemical Stability	Stable at room temperature; avoid strong oxidizers
Amine Value	≤0.1 mg KOH/g
Tertiary Amine Content	≤0.5%
Penetration	~5-15 s (1% aq., canvas disc method)
Foam Property	Medium foam
Alkali Resistance	Good alkali resistance
Unsaturation	~0.8-1.6 mol/kg
Viscosity	~50-200 mPa·s (25°C)
Melting Point	10-30°C (varies with EO number)
Monoester Content	≥90% (in MS-1)
Diester Content	≤5%
Low Shear Viscosity	~200-800 mm²/s (25°C)
Solid Content	≥99
Free Alcohol	≤2.0%
Heavy Metal	≤10 mg/kg (as Pb)
Arsenic	≤2 mg/kg

Emulsifier OS/MS-1

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Related Products

Emulsifier OS/MS-1

Product Details

Applications

Properties

Safety

Product Overview

Packaging and Storage

Specialty Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

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