Question 1

Is castor oil polyoxyethylene ether EL-90 harmful to the human body? Does it have an impact on the environment?

Accepted Answer

Castor oil polyoxyethylene ether EL-90 is a low-toxicity substance, non-irritating to the skin, non-sensitizing, and under normal use conditions poses no significant harm to humans. It also exhibits excellent biodegradability, making it a green adjuvant with low environmental load. Effects on human health According to the safety data of Guoli Chemical products, castor oil polyoxyethylene ether EL-90 is not classified as a hazardous chemical under normal use conditions and has very low health hazards. Toxicological studies show: its acute oral toxicity is extremely low, with a rat oral LD₅₀ > 5,000 mg/kg, classifying it as a low-toxicity substance; standard Draize skin irritation tests indicate no irritation; it may cause only mild reversible eye irritation, with conjunctival irritation scores typically below 15, and full recovery usually within 24 hours; based on available data, no clinically significant sensitization has been found; its volatility at room temperature is very low, posing minimal risk of inhaling aerosols or vapors during routine operations. Repeated or prolonged contact may cause skin dryness, but this is common with surctant products and can be effectively avoided by wearing gloves. Effects on the ecological environment Castor oil polyoxyethylene ether EL-90 performs excellently in environmental protection. Its ecotoxicological data shows low acute toxicity to fish (96-hour LC₅₀ > 100 mg/L), indicating low toxicity to aquatic organisms. More importantly, this product is biodegradable and does not easily persist or accumulate in the natural environment. Due to its strong hydrophilicity and low octanol/water partition coefficient, its bioaccumulation potential is extremely low, and it will not accumulate through the food chain. However, despite its low ecotoxicity, direct discharge of undiluted large quantities into water bodies should still be prevented to avoid local environmental load. Technical parameters (Summary of toxicology and ecotoxicology) ItemIndexEvaluation Acute oral toxicity (rat LD₅₀)> 5,000 mg/kgLow toxicity Skin irritation (Draize test)No irritationSafe Eye irritationMild reversible irritation, recovery within 24 hoursLow risk Skin sensitizationNo clinically significant sensitization foundSafe Inhalation riskVery low volatility at room temperature, minimal riskNo special protection required for routine operations Acute fish toxicity (96h LC₅₀)> 100 mg/LLow aquatic toxicity BiodegradabilityBiodegradableEnvironmentally friendly Bioaccumulation potentialVery lowNon-accumulative Application and safe handling recommendations Castor oil polyoxyethylene ether EL-90 is widely used in agrochemicals, textile fibers, industrial emulsification, daily chemicals, metalworking fluids, leather auxiliaries, and other fields. Under normal industrial operating conditions, this product is highly safe, but it is still recommended to follow these basic protective measures: Hand protection: It is recommended to wear nitrile rubber gloves during operations that may involve continuous contact. Eye protection: Chemical safety goggles should be worn during operations to prevent splashes into the eyes. Ventilation requirements: Keep the operating area well ventilated; no special exhaust equipment is required. Hygiene practices: Wash hands thoroughly with soap and water after operation. Eating, drinking, or smoking is prohibited in the workplace. Precautions Although this product is relatively safe, the following points should still be noted: In case of eye contact, immediately rinse with running water for at least 15 minutes and seek medical attention. In the event of a large spill, immediately construct a dike to prevent the spill from entering drainage systems or surce water bodies. Disposal of waste should be entrusted to a qualified professional waste treatment company and handled in compliance with regulations; do not discard into the natural environment. The product may solidify or become turbid at low temperatures; this is a normal physical change and does not affect performance after slow warming and mixing. Do not use open flames to directly heat the container.

Question 2

What should I do if problems occur during the use of Castor Oil Polyoxyethylene Ether EL-90? How to obtain technical support?

Accepted Answer

If problems occur during the use of Castor Oil Polyoxyethylene Ether EL-90, first take corresponding emergency measures or troubleshooting plans based on the type of problem. For further technical support, directly contact the supplier or manucturer of Guoli Chemical for professional guidance. Common usage issues and troubleshooting suggestions Castor Oil Polyoxyethylene Ether EL-90, as a nonionic surctant, has stable physicochemical properties, but during use, the following typical problems may arise due to operating conditions, storage environment, or formulation compatibility: 1. Product solidification or cloudiness: The melting point of EL-90 is 35~40°C. Under low-temperature environments, the product will naturally solidify or become cloudy. This is a normal physical change and does not affect product quality. The solution is to use indirect heating (such as a warm water bath, temperature not exceeding 40°C) to slowly melt and stir evenly before normal use. Do not use open flames to directly heat the container to avoid local overheating that may cause product decomposition. 2. Unsatisctory emulsification effect or emulsion layering: Possible reasons include: mismatch of HLB value (HLB value of EL-90 is 16-17) with the oil phase, need to optimize emulsification process parameters (temperature, shear speed, addition sequence), or high water hardness. It is recommended to check whether the required HLB value of the oil phase in the formulation matches EL-90, adjust the emulsification temperature to a suitable range, and ensure adequate shear homogenization. 3. Slow dissolution or uneven dispersion: EL-90 is a paste or viscous liquid at room temperature, with a viscosity of 2000~3000 mm²/s (25°C). It is recommended to slowly add it to warm water (30~50°C) under stirring to dissolve, or pre-disperse it with a small amount of organic solvent such as ethanol or acetone before adding to the aqueous phase, which can effectively speed up dissolution. 4. Darkening of product color or off-odor: This may be caused by storage temperature exceeding 40°C, prolonged exposure to air or direct sunlight, or contact with incompatible substances (strong acids, strong bases, strong oxidizers). Immediately check the storage environment to ensure the product is sealed and stored in a cool, dry place at 5~40°C, away from light. Emergency measures (in case of accidental contact or spill) Emergency treatment for personnel contact Contact typeMeasures Skin contactImmediately remove contaminated clothing, thoroughly rinse the affected area with plenty of running water and mild soap. If irritation persists, seek medical advice. Eye contactImmediately open eyelids and rinse slowly with plenty of running water or normal saline for at least 15 minutes, rolling eyes to ensure thorough rinsing. Remove contact lenses if worn. If irritation persists, seek medical attention immediately. InhalationQuickly move the patient to fresh air, loosen tight clothing, and maintain an open airway. If breathing difficulty or persistent symptoms occur, seek medical attention immediately. IngestionIf the patient is conscious, rinse mouth with water several times, slowly administer about 200 mL of water to dilute stomach contents. Do not induce vomiting. Seek medical attention immediately and present product label or safety instructions. Spill handling When handling spills, wear nitrile gloves and chemical safety goggles. Immediately use inert materials such as sand or vermiculite to build containment dikes to control spread, and prevent leakage from entering drainage systems or water bodies. For liquid spills, absorb completely with activated clay or universal absorbent pads, then place in a sealed compatible container for professional disposal. Also collect any wash water and dispose of it in compliance with local regulations by a qualified professional waste disposal company. How to obtain technical support If the above solutions do not resolve the issue, or if you encounter in-depth technical problems such as formulation development or process optimization, it is recommended to obtain professional support through the following channels: Contact the supplier: Directly contact the supplier or distributor from whom you purchased the EL-90 product, providing the product batch number, purchase date, and a detailed description of the problem. The supplier can usually coordinate with the manucturer's technical team for targeted answers. Contact Guoli Chemical: As the product manucturer, Hai'an County Guoli Chemical Co., Ltd. can provide the most authoritative technical support services, including product selection recommendations, formulation optimization guidance, safety data sheet (SDS/MSDS) updates, and product test report requests. Review product information: Visit the official website of Guoli Chemical to access the latest product technical data and application cases, and learn about experience and solutions for product use in different industries. Notes When contacting technical support, please prepare the product batch number, usage conditions (temperature, pH, formulation system), and detailed records of specific abnormalities to help technicians quickly diagnose the problem. This product is not classified as a hazardous chemical (GHS classification), but it is still recommended to wear nitrile gloves and chemical safety goggles during operation, and maintain good ventilation in the operating area. Do not directly discharge large amounts of undiluted product into water bodies. Although the product has good biodegradability, waste disposal should still comply with local environmental regulations. This product should be stored in a cool, dry environment at 5~40°C, following the "first in, first out" inventory turnover principle, and immediately seal the container after use.

Question 3

How to purchase Castor Oil Polyoxyethylene Ether EL-90? What is the minimum order quantity?

Accepted Answer

To purchase Castor Oil Polyoxyethylene Ether EL-90, please contact the sales team of Guoli Chemical directly. The minimum order quantity for this product is not specified in the database, and the actual price is subject to real-time quotations. Detailed Description Castor Oil Polyoxyethylene Ether EL-90 (CAS No.: 61791-12-6) is one of the core nonionic surctant products of Guoli Chemical. According to the product database information, this product is available in a variety of packaging options, including 50kg plastic drums, 200kg plastic drums, and IBC totes, catering to different needs from small trial samples to large-scale industrial procurement. It should be noted that the minimum order quantity (MOQ) for this product is not explicitly listed in the database. Additionally, the product price field displays: "The above prices are for reference only. Please contact the sales team for the latest quotation." The quoted unit is yuan/ton (CNY), and the price adjusts dynamically with raw material fluctuations, procurement volume, and market supply-demand conditions. Therefore, a fixed quotation cannot be provided here. Procurement Methods If you need to purchase or request a quotation, it is recommended that you contact the sales department of Haian Guoli Chemical Co., Ltd. through the following channels: Phone Inquiry: Call the official sales hotline of Guoli Chemical directly, mention the product name "Castor Oil Polyoxyethylene Ether EL-90" or "Emulsifier EL-90," and obtain real-time quotations and delivery times. Inquiry Email: Send your procurement requirements (including quantity, packaging requirements, delivery location, etc.) to the Guoli Chemical sales email, and the sales team will provide you with a formal written quotation. Online Inquiry: Submit your procurement intention through the online customer service or message system on the official website of Guoli Chemical. On-site Visit: You can also schedule a visit to the Guoli Chemical ctory to inspect product quality and production capacity on-site before signing a formal purchase and sales contract. Packaging Specifications Reference Packaging TypeSpecificationApplicable Scenario Plastic Drum50kg/drumSmall batch trials, laboratory R&D Plastic Drum200kg/drumMedium batch industrial production IBC ToteApprox. 1000kg/toteLarge-scale industrial procurement Application Suggestions Castor Oil Polyoxyethylene Ether EL-90 has an HLB value of up to 16-17, making it an excellent O/W emulsifier widely used in pesticide formulations, textile printing and dyeing, metalworking fluids, cosmetics, and emulsion polymerization. Its 1% aqueous solution has a pH of 5.5-7.5 and a cloud point of 91.0-96.0°C, maintaining excellent chemical stability over a wide pH and temperature range. If you need to confirm whether this product is suitable for a specific process formulation, it is recommended to request a free sample for small-scale testing before procurement. Notes This product is not classified as a dangerous chemical. It can be transported under normal cargo conditions with no special transportation regulations. The recommended storage temperature is 5°C to 40°C. Solidification or turbidity may occur at low temperatures; it can be restored by slowly warming and mixing, without affecting performance. The product is hygroscopic. After opening, it should be resealed promptly to avoid prolonged exposure to air. The above packaging information is based on standard specifications recorded in the database. If you require customized packaging, please consult with the sales team for confirmation.

Question 4

Does Castor Oil Polyoxyethylene Ether EL-90 meet environmental requirements? Can a test report be provided?

Accepted Answer

Castor Oil Polyoxyethylene Ether EL-90 meets environmental requirements and is a low environmental load green auxiliary agent. Detailed Description Castor Oil Polyoxyethylene Ether EL-90 is made from natural castor oil through polymerization with ethylene oxide. Its molecular structure determines good environmental compatibility. According to the ecotoxicological data in the product safety information, this product is a biodegradable substance that does not easily persist or accumulate in the environment, meeting the basic requirements of modern environmental protection for green auxiliaries. Additionally, its strong hydrophilicity and low octanol/water partition coefficient result in extremely low bioaccumulation potential, preventing accumulation in organisms through the food chain. Under the GHS classification system, EL-90 is not classified as a hazardous chemical under normal use conditions, with no physical, health, or environmental hazard categories. Its acute toxicity to aquatic organisms is low—the 96-hour median lethal concentration (LC50) for fish is greater than 100 mg/L, indicating that the impact on aquatic ecosystems is controllable under conventional use and reasonable discharge conditions. However, although EL-90 has low toxicity and is biodegradable, the product safety information emphasizes: large quantities of undiluted product should be prevented from being directly discharged into water bodies. For disposal, it must be handed over to a qualified professional waste treatment operator for compliant treatment, and must not be arbitrarily discarded into the natural environment. Regarding Test Reports As of now, there is no electronic version of third-party environmental test reports for EL-90 available for direct download in the Guoli Chemical product database. If you require product RoHS, REACH, biodegradability test reports, or third-party certification documents such as SGS, it is recommended to obtain them through the following methods: Contact Guoli Chemical sales or technical support directly to request the latest version of the SDS (Safety Data Sheet) and relevant test reports. Contact the manucturer to obtain the COA (Certificate of Analysis) for this batch, which usually includes measured data for some physical and chemical indicators. If there are special environmental compliance requirements (e.g., EU REACH registration for export, environmental audits by specific customers), a third-party testing agency can be commissioned to conduct targeted testing on the purchased batch. Notes Environmental regulations for surctants vary across different countries and regions (e.g., EU Detergents Regulation 648/2004, US EPA standards). If EL-90 is used in exported products or end applications subject to specific regulations, it is recommended to confirm the product's compliance status with Guoli Chemical technical personnel before use and request corresponding compliance statements or test documents according to the destination regulations.

Question 5

What are the advantages of Castor Oil Polyoxyethylene Ether EL-90 compared to other similar products?

Accepted Answer

According to the technical data from Guoli Chemical, the core advantages of Castor Oil Polyoxyethylene Ether EL-90 lie in its **excellent hydrophilic emulsification ability due to high HLB value, outstanding chemical stability and broad compatibility, as well as remarkable environmental and safety characteristics**. As a nonionic castor oil derivative with a high ethylene oxide (EO) addition number, EL-90 exhibits differentiated advantages in multiple key performance aspects compared to low-EO products (such as EL-20, EL-40) and other types of emulsifiers. ### Detailed Core Advantages 1. **Superior Hydrophilic Emulsification and Solubilization Capacity** * **High HLB Value**: EL-90 has an HLB value as high as **16-17**, making it a typical O/W (oil-in-water) emulsifier that can easily emulsify various oil phases, fragrances, and active ingredients into a stable, fine aqueous system. * **Efficient Solubilization**: Thanks to its long EO chain, it has a significant solubilizing effect on poorly soluble substances, greatly improving the transparency and long-term stability of formulations, which is difficult for low-EO products and many ionic surctants to achieve. 2. **Excellent Water Solubility and Broad Compatibility** * **Fully Water Soluble**: EL-90 is easily soluble in water, forming a clear and transparent solution, making it very convenient to use. * **Outstanding Chemical Stability**: It exhibits excellent tolerance to acids, alkalis, hard water, and electrolytes. It maintains stable performance in complex or extreme formulation systems (such as strong alkaline cleaners and high-salt metalworking fluids) without delamination or ilure, which is one of its core advantages. 3. **Environmentally Friendly and Mildly Safe** * **Green Attribute**: The product is readily biodegradable with very low bioaccumulation potential, meeting the high environmental requirements of modern industry. * **High Safety**: It has extremely low acute oral toxicity (LD50 > 5,000 mg/kg), is non-irritating to the skin, and causes only slight reversible irritation to the eyes. It is not classified as a dangerous chemical. This makes it very suitable for personal care and household cleaning products. 4. **Multi-functionality and Emulsion Stability** EL-90 is not just a simple emulsifier; it integrates functions of emulsification, dispersion, stabilization, and wetting. It can effectively reduce intercial tension, obtain stable emulsions with narrow particle size distribution, and reduce the synergistic need for multiple auxiliaries in the formulation. ### Core Technical Parameter Comparison (Based on Guoli Chemical Database) The following data intuitively shows how the characteristics of EL-90 translate into application advantages: | Technical Parameter | EL-90 Typical Value | Advantage Interpretation | | :--- | :--- | :--- | | **Ionic Type** | Nonionic | Can be compounded with anionic, cationic, and nonionic auxiliaries, offering extremely broad formulation adaptability. | | **HLB Value** | 16-17 | **Efficient O/W emulsification**, especially suitable for difficult-to-emulsify light mineral oils and synthetic esters. | | **Cloud Point (1% aqueous solution)** | 91.0 ~ 96.0 ℃ | **Very high cloud point**, indicating it maintains excellent dissolution and emulsification abilities in high-temperature processes (e.g., high-temperature dyeing, hot cleaning). | | **Active Content** | ≥ 99% | High purity with low moisture content (≤1.0%), ensuring the most effective emulsification. | | **pH Value (1% aqueous solution)** | 5.5 ~ 7.5 | Nearly neutral, mild and non-irritating, friendly to sensitive substrates (e.g., human skin, fine brics). | | **Foam Characteristics** | Low foam | Suitable for industrial operations requiring low foam, such as high-speed spinning oil agents and metal cutting fluids, reducing the need for defoamers. | ### Application Recommendations Based on the above advantages, EL-90 is particularly suitable for the following high-demand fields: * **Cosmetics**: As a mild emulsifier and solubilizer for creams, lotions, cleansing oils, and body washes, providing a light and non-greasy skin feel. * **Pesticide Formulations**: As an emulsifier for efficient emulsion in water (EW) and microemulsion (ME) formulations, especially for export preparations with high environmental requirements. * **Textile and Chemical Fiber**: As a core component of high-temperature leveling agents and high-performance chemical fiber oil agents, leveraging its high cloud point and strong stability. * **Metalworking Fluids**: As the main emulsifier and lubricant in fully synthetic and semi-synthetic cutting fluids, resistant to hard water and spoilage. ### Precautions * **Solidification Handling**: This product has a melting point between **35~40℃** and will solidify into a paste at low temperatures. Before use, it should be **indirectly heated and melted in a warm water bath and stirred evenly**. No open flame heating is allowed. This is a normal physical phenomenon and does not affect product quality. * **Combination Use**: To achieve optimal emulsion stability, it is often used in combination with low-HLB emulsifiers (such as EL-10, S-80).

Question 6

How should Castor Oil Polyoxyethylene Ether EL-90 be stored? What is the shelf life?

Accepted Answer

Castor Oil Polyoxyethylene Ether EL-90 should be stored sealed in a cool, dry, and well-ventilated place, with a recommended temperature of 5°C to 40°C; under unopened and properly stored conditions, the recommended shelf life is 2 years. Detailed Description Castor Oil Polyoxyethylene Ether EL-90 (CAS: 61791-12-6) is a chemically stable nonionic surctant, and its storage conditions directly affect the retention of product performance. According to the safety instructions of Guoli Chemical, the recommended long-term storage temperature for this product is 5°C to 40°C. At low temperatures (below 5°C), the product may solidify or become turbid, which is a normal physical change and not a sign of product deterioration—simply warm it slowly within the recommended temperature range (e.g., using indirect heating in a warm water bath) and stir evenly to restore normal performance; do not use an open flame to directly heat the container. The choice of packaging container is equally critical. It is recommended to use containers made of stainless steel, high-density polyethylene (HDPE), or polypropylene (PP), and the containers must be clean, dry, and well-sealed. Ordinary carbon steel should not be in long-term direct contact with the product. The product should be kept away from incompatible substances such as strong acids, strong bases, strong oxidizers, and hypochlorites. Warehouse management should follow the "first in, first out" principle. Regarding shelf life, the product database does not officially specify a specific shelf life. Based on the chemical structure of this product (polyoxyethylene ether nonionic surctant) and industry practice, under strict compliance with the above storage conditions and keeping the original sealed packaging, it is recommended to use within 2 years from the date of manucture to ensure optimal performance. For the exact shelf life, please refer to the product's certificate of analysis (COA) or label markings. Technical Parameters The following are key technical indicators related to storage and use: Parameter ItemTechnical Indicator AppearanceLight yellow to yellow paste or viscous liquid Melting Point/Freezing Point35~40°C Recommended Storage Temperature5°C to 40°C Effective Content≥99% Moisture≤1.0% pH Value (1% Aqueous Solution)5.5~7.5 Chemical StabilityGood chemical stability against acids, alkalis, hard water, and oxidizing agents HygroscopicityHygroscopic Flash Point>250°C Packaging Specifications50kg plastic drum, 200kg plastic drum, IBC tote Application Recommendations This product is widely used in industrial fields such as chemical fiber oil agents, pesticide emulsifiers, textile auxiliaries, and metalworking fluids. It is recommended that users check the batch number and production date after receiving goods and prioritize using earlier batches for production. For large-quantity purchases (e.g., IBC tote packaging), consider sub-packaging into smaller containers to reduce the frequency of opening the main container and minimize moisture absorption and contamination risks. If the product solidifies due to low temperatures, place the entire drum in a room at 20~35°C for natural warming, or use indirect heating with a water bath not exceeding 50°C, stirring periodically; avoid localized overheating. Precautions Seal and Protect from Moisture: The product is hygroscopic. After opening the drum and taking out material, immediately reseal it to avoid prolonged exposure to air, which may cause moisture absorption or caking. Low-Temperature Handling: Solidification at low temperatures is normal. Do not use open flame heating or direct steam injection; use indirect water heating to slowly melt and stir evenly. Shelf Life Reference: 2 years is an industry empirical suggestion; the specific shelf life should be based on the expiration date indicated on the product label or Certificate of Analysis (COA). Keep Away from Incompatible Substances: The storage area should be segregated and effectively isolated from strong acids, strong bases, and strong oxidizers. Compliant Disposal: Expired products must not be dumped arbitrarily; they should be handed over to qualified waste disposal operators for compliant disposal.

Question 7

What safety precautions should be taken when using Castor Oil Polyoxyethylene Ether EL-90?

Accepted Answer

Castor Oil Polyoxyethylene Ether EL-90 has good overall safety, being a low-toxicity, non-irritating nonionic surctant. However, standard industrial hygiene measures and personal protection requirements should still be followed during operation. Detailed Description Castor Oil Polyoxyethylene Ether EL-90 (PEG-90 Castor Oil) is not classified as a hazardous chemical under normal usage conditions. It poses no risk of flammability or explosion, and is neither an oxidizer nor a corrosive substance. Its acute oral toxicity is extremely low (rat oral LD50 > 5,000 mg\/kg), and skin irritation tests show it is non-irritating. It may cause only mild reversible eye irritation. However, repeated or prolonged contact may cause skin dryness, so operators are still advised to cultivate safe operating habits. During use, ensure good ventilation in the operating area and avoid direct contact with eyes and skin. After operation and before eating, thoroughly wash hands and any potentially exposed body parts with soap and water. No eating, drinking, or smoking is allowed in the workplace. If the product becomes viscous or solidifies due to low temperatures, use indirect heating methods (e.g., warm water bath) to slowly melt and stir it evenly. Do not directly heat the container with an open flame. Summary of Key Safety Operation Points Personal Protective Equipment Protection AreaProtection Requirements Hand ProtectionNitrile rubber gloves or chemical-resistant gloves are recommended for operations involving prolonged contact. Eye ProtectionWear chemical safety goggles or a ce shield during operation to prevent splashes into the eyes. Body ProtectionOrdinary long-sleeved work clothing is sufficient. For operations with splashing or large pouring, an impermeable apron is recommended. Respiratory ProtectionNo special protection is required in well-ventilated areas. In confined spaces or when aerosols may be generated, wear a particulate filter half-mask. Storage Precautions Storage ConditionSpecific Requirements Storage EnvironmentStore indoors in a cool, dry, and well-ventilated warehouse, away from direct heat sources and sunlight. Recommended Temperature5°C to 40°C. At low temperatures, solidification or cloudiness may occur; slow warming and mixing will restore performance. Container MaterialStainless steel, high-density polyethylene (HDPE), or polypropylene (PP) recommended. Avoid prolonged direct contact with ordinary carbon steel. Incompatible SubstancesShould be stored separately from strong acids, strong bases, strong oxidizers, and hypochlorites. Inventory ManagementFollow the "first in, first out" principle. Re-seal containers promptly after opening. Emergency Response Measures Skin Contact: Immediately remove contaminated clothing and wash thoroughly with plenty of running water and mild soap. If irritation persists, seek medical advice. Eye Contact: Immediately open eyelids and rinse thoroughly with plenty of running water or saline solution for at least 15 minutes, turning the eyes to ensure complete rinsing. If wearing contact lenses and easy to remove, remove them immediately. If irritation persists, seek immediate medical attention. Inhalation: Quickly move the affected person to fresh air and maintain an open airway. If breathing difficulties or persistent symptoms occur, seek medical attention immediately. Ingestion: Do not give anything by mouth to an unconscious person. If the person is conscious, rinse the mouth with water and slowly give about 200 ml of water to dilute stomach contents. Do not induce vomiting. Seek medical attention immediately. Spill Handling: Wear nitrile gloves and chemical goggles. Contain the spill with inert materials such as sand, vermiculite, etc., and prevent entry into drains or water bodies. Absorb liquid spills with absorbent material, collect in sealed containers, and dispose of according to local regulations. Application Recommendations Castor Oil Polyoxyethylene Ether EL-90 is widely used in pesticide emulsifiers, fiber finishes, textile auxiliaries, metalworking fluids, leather auxiliaries, and household chemicals. When used in formulations, it is recommended to conduct gradient tests within the typical nonionic surctant dosage range (usually 1%-10% of the total formulation) based on the specific emulsification system and process conditions, to optimize the optimal addition amount. Notes This product is transported as general cargo and is not subject to special control under dangerous goods transport regulations. Disposal must comply with national, regional, and local environmental regulations. Do not dispose of arbitrarily. Entrust qualified professional waste treatment operators for compliant disposal through high-temperature incineration or biological wastewater treatment cilities. Although this product is not classified as a hazardous chemical, large amounts of undiluted product should not be directly discharged into water bodies. Containers, after being completely emptied and cleaned, can be recycled according to material classification. The above safety information is compiled based on available reliable scientific data. Users should conduct risk assessments based on their specific process conditions and develop customized safety management procedures.

Question 8

How to use Castor Oil Polyoxyethylene Ether EL-90? What is the recommended dosage?

Accepted Answer

The usage method of Castor Oil Polyoxyethylene Ether EL-90 varies by application field. It is typically added directly to the aqueous or oil phase as an emulsifier or solubilizer. The recommended dosage is generally 1%~15% of the total formula, with the specific amount determined by experiments based on system properties and emulsification goals. Detailed Explanation Castor Oil Polyoxyethylene Ether EL-90 (PEG-90 Castor Oil) is a nonionic surctant with a high HLB value (16-17). It is easily soluble in water and appears as a light yellow to yellow paste at room temperature. Its melting point is approximately 35~40°C, so it may solidify or become viscous under low-temperature conditions. Before use, if the product solidifies due to low temperature, it should be slowly melted and stirred evenly using indirect heating methods (e.g., a warm water bath). Direct flame heating of the container is strictly prohibited. Melting does not affect product performance. As an O/W type emulsifier, EL-90 can be directly added to the aqueous phase with stirring, followed by the oil phase for emulsification. Alternatively, depending on process requirements, it can be mixed with the oil phase first, then water is added for phase inversion emulsification. Due to its excellent chemical stability, it maintains good performance across a wide pH range and in systems containing electrolytes or hard water, offering flexible feeding sequences. Application Recommendations The specific usage and recommended dosage (based on total formula mass) of EL-90 in different industries are as follows: Industrial Emulsification and Emulsion Polymerization: As the primary emulsifier, the general dosage is 2%~6% of the monomer or oil phase mass. It can be dissolved in water, then added to the monomer for pre-emulsification, or directly participate in the polymerization reaction, providing excellent emulsion stability and narrow particle size distribution. Pesticide Formulations (Emulsifiable Concentrate/Microemulsion/Emulsion in Water): As a key emulsifying and dispersing component, the conventional dosage is 5%~15% of the total formulation. Better results are achieved when used in combination with other anionic emulsifiers (e.g., calcium salts), significantly improving the dispersion uniformity and field efficacy of the active pesticide ingredients. Synthetic Fiber Oils and Textile Auxiliaries: In synthetic fiber oil formulations, EL-90 serves as a component of smoothing and bundling agents, with a recommended dosage of 5%~15% of the total oil agent. When used in textile pre-treatment or finishing auxiliaries, the dosage in the working solution is typically 0.5~2 g/L, enhancing penetration and leveling effects. Cosmetics and Personal Care Products: As a mild emulsifying solubilizer, the common dosage in creams, lotions, shampoos, etc., is 1%~5%. It can be added during the heating of the aqueous phase to help uniformly disperse active ingredients and fragrances, improving skin feel. Due to its low foaming and non-irritating properties to the skin, it is especially suitable for sensitive skin formulations. Metalworking Fluids: In emulsified cutting fluid or grinding fluid formulations, EL-90 not only acts as an emulsifier but also provides synergistic lubrication and anti-rust effects. The dosage in the concentrate is typically 5%~15%, and the effective concentration significantly decreases after dilution into the working solution. Leather Auxiliaries: In leather degreasing and tliquoring processes, EL-90 helps uniform absorption of oils and dyes, imparting a soft hand feel to the leather. Its dosage depends on the processing stage and oil content, generally ranging from 2%~8% of the active substance mass in the tliquor or treatment bath. (Note: The above dosages are general recommendations based on product characteristics and industry experience. Since the base formulations in various application systems vary widely, the optimal dosage must be determined through laboratory small-scale trials and pilot production. The database currently does not include precise dosage data for specific formulations.) Precautions Feeding and Dissolution: EL-90 is readily soluble in water. Directly add it to the aqueous phase and stir to disperse and dissolve. To accelerate dissolution, use warm water at 40~50°C with stirring. Avoid direct mixing or storage with strong acids, strong bases, or strong oxidizers. Low-Temperature Handling: In winter or under low-temperature storage, the product may solidify into a paste, which is a normal physical phenomenon. Before use, soften it by heating in a warm water bath, stir evenly once it becomes flowable; this does not affect performance. Direct flame heating is strictly prohibited. Personal Protection: Although EL-90 is a low-toxicity substance with very low skin and eye irritation, it is recommended to wear nitrile gloves and chemical safety goggles during operation, and maintain ventilation in the workplace. Wash hands with soap and water after operation. Storage Conditions: It is recommended to store sealed in a cool, dry warehouse at 5°C~40°C, using containers made of stainless steel, HDPE, or PP. Follow the "first-in, first-out" principle for rotation to maintain optimal application performance.

Question 9

What are the main industries and processes where Castor Oil Polyoxyethylene Ether EL-90 is applied?

Accepted Answer

Castor Oil Polyoxyethylene Ether EL-90 is widely used in multiple industries such as agrochemicals, textile and chemical fiber, industrial emulsification, daily chemicals, metal processing, and leather, serving as a multifunctional nonionic surctant. Detailed Description Castor Oil Polyoxyethylene Ether EL-90 (also known as PEG-90 Castor Oil) is a nonionic surctant produced by polymerizing castor oil with ethylene oxide. It appears as a pale yellow to yellow paste or viscous liquid. With its excellent emulsifying ability, high solubilizing and dispersing properties, outstanding wetting and spreading performance, and superior chemical compatibility, this product is widely used in many industrial fields. It has strong hydrophilicity, belongs to the O/W type emulsifier, remains stable over a wide pH range, exhibits good resistance to hard water and electrolytes, and has good biodegradability, making it a green auxiliary with low environmental load. In terms of process application, EL-90 mainly performs multiple functions such as emulsification, dispersion, solubilization, wetting, smoothing, and antistatic properties. It can be used alone as a primary emulsifier or compounded with other surctants to meet the specific HLB value and emulsion stability requirements of different formulation systems. Whether in high-temperature or room-temperature processes, this product can provide a stable emulsion system, ensuring smooth production processes and excellent quality of end products. Main Application Industries and Processes Application Industry Specific Process/Use Functional Role Agrochemicals Formulation of pesticide emulsifiable concentrates, microemulsions, and emulsion concentrates in water Emulsifier, solubilizer, helping active ingredients disperse evenly, improving efficacy and field application results Textile and Chemical Fiber Industry Formulation of chemical fiber oil agents, pretreatment, dyeing, and finishing auxiliaries Provides smoothness, bundling, and antistatic properties; enhances penetration, leveling, and softening effects Industrial Emulsification and Dispersion Emulsion polymerization (polymerization of monomers such as acrylic acid and vinyl acetate) Nucleation and stabilization role, ensuring smooth polymerization reactions and obtaining high-quality emulsion Detergent Industry Household and industrial detergents, heavy-duty liquid detergents, hard surce cleaners Improves detergency, dispersibility, and foam control ability Cosmetics and Personal Care Formulations of creams, lotions, shampoos, and body washes Gentle emulsification and solubilization, helping active ingredients disperse evenly and improving skin feel Metalworking Fluids Cutting fluids, grinding fluids, rust preventive fluids Synergistic effects of emulsification, lubrication, and rust prevention, improving machining accuracy and extending tool life Leather Processing Leather degreasing, tliquoring, and finishing processes Imparts soft and full handle to leather, cilitates uniform absorption of dyes and oils Application Recommendations EL-90 is suitable for O/W emulsion systems. In actual formulations, it is recommended to adjust the dosage based on the HLB value requirement of the target system. This product can be used alone or compounded with nonionic or anionic surctants to achieve synergistic effects. In pesticide formulations, it is recommended for emulsifiable concentrates and microemulsion formulations; in the textile field, it is suitable as a core component of chemical fiber oil agents; in metalworking fluids, it can be used in combination with rust inhibitors and extreme pressure additives. The product may solidify or become turbid at low temperatures; it is recommended to slowly warm it within the range of 5°C to 40°C and stir evenly before use to restore normal performance. Precautions The product should be stored in a cool, dry, and well-ventilated indoor environment, with a recommended long-term storage temperature of 5°C to 40°C. Solidification at low temperatures is a normal physical change. Use indirect heating methods (such as a warm water bath) to slowly melt it; do not directly heat the container with an open flame. During operation, it is recommended to wear nitrile rubber gloves and chemical safety goggles to avoid prolonged skin contact and splashes into the eyes. Prevent large amounts of undiluted product from being directly discharged into water bodies. Dispose of it in compliance with local regulations after use.

Question 10

What are the physicochemical technical parameters of Castor oil polyoxyethylene ether EL-90?

Accepted Answer

EL-90 is a high-ethoxylated nonionic surctant, appearing as a light yellow paste with strong hydrophilicity, widely used in emulsification and solubilization systems. Detailed Description Castor oil polyoxyethylene ether EL-90 (CAS: 61791-12-6) is a nonionic surctant produced by addition polymerization of natural castor oil with 90 moles of ethylene oxide (EO). The molecular formula is C57H104O9(C2H4O)90, and it appears as a light yellow to yellow paste or viscous liquid. Due to the high ethoxylation number of 90, the product has excellent water solubility, high cloud point, and is a typical O/W emulsifier. As a high HLB surctant, EL-90 exhibits outstanding emulsifying, solubilizing, and dispersing capabilities. It maintains stable intercial activity over a wide pH range and temperature conditions, with excellent resistance to hard water and electrolytes. The product has good biodegradability, very low acute toxicity (oral LD50 > 5,000 mg/kg), and is non-irritating to the skin, balancing high performance with environmental safety in industrial formulations. The following technical parameters combine information from the Guoli Chemical product database and general physicochemical index ranges for this type of product. For specific batch values, please refer to the manucturer's Certificate of Analysis (COA). Technical Parameters Parameter Specification Range / Description Data Source Product Name Castor oil polyoxyethylene ether EL-90 / PEG-90 castor oil Guoli Chemical Product Database CAS Number 61791-12-6 Guoli Chemical Product Database Molecular Formula C57H104O9(C2H4O)90 Guoli Chemical Product Database Product Type Nonionic surctant Guoli Chemical Product Database Appearance (25°C) Light yellow to yellow paste or viscous liquid Guoli Chemical Product Database HLB Value (Hydrophilic-Lipophilic Balance) Approximately 15 ~ 16.5 (high hydrophilicity) General literature reference value Cloud Point (1% aqueous solution) Approximately 75 ~ 90°C (>100°C in 10% NaCl solution) General literature reference value Hydroxyl Value Approximately 28 ~ 40 mgKOH/g General literature reference value Acid Value ≤ 1.0 mgKOH/g General industry standard Moisture Content ≤ 1.0% General industry standard pH Value (1% aqueous solution) 5.0 ~ 7.0 General industry standard Solubility Easily soluble in water and various polar organic solvents General technical data Solidification Point / Pour Point Not available — Density (25°C) Not available — Viscosity (25°C) Not available — Application Recommendations Based on its high HLB value and strong water solubility, EL-90 is particularly suitable as an emulsifier and solubilizer for O/W systems. Recommended application scenarios include: Pesticide formulations: Used as the primary emulsifier in emulsifiable concentrates, microemulsions, and emulsion concentrates, with typical dosage ranging from 5% to 15% of the total formulation. Cosmetics and personal care products: Used as a mild emulsifying solubilizer in creams, lotions, and shampoos, typically at 1% to 5%. Industrial cleaning and detergents: Used as a nonionic active component in heavy-duty liquid detergents to enhance detergency and dispersibility. Textile and synthetic fiber industry: Used as a spinning oil agent and textile pretreatment auxiliary to provide smoothness and permeability. Metalworking fluids: Used as an emulsifier to formulate cutting fluids and grinding fluids, offering both lubrication and rust prevention. Precautions The product may solidify or become cloudy at low temperatures, which is a normal physical phenomenon. Use indirect heating (e.g., warm water bath) to slowly warm it to around 40°C and stir well before use. Do not heat containers directly with an open flame. Recommended storage temperature: 5°C ~ 40°C. Store in a cool, dry, well-ventilated warehouse. Seal the container promptly after use. Wear nitrile gloves and chemical safety goggles when handling. Ensure adequate ventilation in the workplace. The above partial physicochemical parameters (HLB, cloud point, hydroxyl value, etc.) are general literature reference values, not directly provided by the Guoli Chemical product database. For specific batch indices, refer to the product COA. For the latest Safety Data Sheet (SDS) or detailed technical information, please contact Guoli Chemical technical support department directly.

Property	Value
CAS No.	61791-12-6
Molecular Formula	C57H104O9(C2H4O)90
Appearance	Pale yellow to yellow
Ionic Type	Nonionic
Avg. Molecular Weight	Approx. 4900
Cloud Point	91.0~96.0
Active Content	≥99
pH Value(1%)	5.5~7.5
pH Value(5%)	5.5~7.5
Iodine Value	≤2.0 gI₂/100g
Solubility	Readily soluble in water, ethanol, acetone and other organic solvents; insoluble in petroleum ether
Surface Tension	~40.0 mN/m (1%aq. soln.,25°C)
CMC	0.01~0.02 g/L
Acid Value	≤1.0
Saponification Value	30~45 mg KOH/g
Hydroxyl Value	37.0~41.0
Moisture	≤1.0
Density	1.04~1.08
Kinematic Viscosity	~2000~3000 mm²/s (25°C)
Refractive Index	1.470~1.480 (20°C)
Flash Point	>250°C
Hygroscopicity	Hygroscopic
Chemical Stability	Good chemical stability against acids, alkalis, hard water and oxidizers
Penetration	>300 s (1% aq., canvas disc)
Foam Property	Low foam
Alkali Resistance	Good
Unsaturation	Low (Iodine Value ≤2.0 g I₂/100g)
Viscosity	~2500 mPa·s (25°C)
Melting Point	35~40°C
Low Shear Viscosity	~2500 mPa·s (25℃)
Solid Content	≥99%
Free Alcohol	≤2.0%
Heavy Metal	≤10 mg/kg
Arsenic	≤2 mg/kg

Castor Oil Ethoxylate EL-90

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