Question 1

Is polyether L-42 harmful to human health? Does it have any impact on the environment?

Accepted Answer

Polyether L-42 is a low-toxicity, safe nonionic surctant with no significant harm to human health, environmentally friendly and easily biodegradable. Detailed Description Polyether L-42 (Poloxamer 122) is a high molecular weight polyoxypropylene-polyoxyethylene block copolymer ether. According to the United Nations' Globally Harmonized System of Classification and Labelling of Chemicals (GHS) classification criteria, this product is not classified as a health hazard or environmental hazard substance. Its acute toxicity, skin corrosion/irritation, serious eye damage/eye irritation, respiratory or skin sensitization, germ cell mutagenicity, carcinogenicity, reproductive toxicity and other toxicological endpoints do not meet the classification criteria, demonstrating excellent overall safety performance. From an environmental perspective, Polyether L-42 has good biodegradability, no bioaccumulation potential (Log Pow In terms of transportation and storage, Polyether L-42 is classified as a non-hazardous substance under current regulations, with a closed-cup flash point above 200°C. It is not a flammable liquid, has no explosive properties, and is not an oxidizing agent, posing very low safety risks under normal use conditions. Safe Handling Recommendations Although the product itself is highly safe, Guoli Chemical still recommends following the following basic protective measures in industrial operations: Wear chemical safety goggles and protective gloves when handling, and wear appropriate work clothing to avoid prolonged skin and eye contact. Ensure good ventilation at the work site, using local exhaust or general ventilation to prevent aerosol accumulation. Wash hands thoroughly after handling. Contaminated clothing must be cleaned before reuse. Follow good industrial hygiene practices. Eating, drinking, smoking, and storing food are prohibited in the workplace. First Aid Measures Skin contact: Immediately remove contaminated clothing and thoroughly rinse skin with plenty of soap and flowing lukewarm water. If irritation persists, seek medical advice. Eye contact: Immediately flush eyes with plenty of flowing clean water or saline for at least 15 minutes, holding eyelids open. If wearing contact lenses, remove them and continue flushing, then seek immediate medical attention. Inhalation: Immediately move the person to fresh air and maintain an open airway. If respiratory discomfort or persistent cough occurs, seek medical attention immediately. Ingestion: Rinse mouth with water. Do NOT induce vomiting. Seek immediate medical attention and show the product container or safety data sheet. Environmental Spill Management Small spills: Absorb with inert absorbent material (e.g., sand, vermiculite, universal absorbent pad) and sweep into a closed container. Dispose of waste in accordance with local regulations. Large spills: Quickly evacuate personnel to a safe area, contain the spill to prevent entry into sewers, waterways, or low-lying areas. Use explosion-proof tools to collect and transfer to a spare container for recovery or disposal.

Question 2

What should I do if problems occur during the use of Polyether L-42? How to obtain technical support?

Accepted Answer

If problems occur during the use of Polyether L-42, you can quickly obtain professional technical support from Guoli Chemical through multiple channels, ranging from routine troubleshooting to emergency handling, with a complete response mechanism. Quick Troubleshooting for Common Problems During the use of Polyether L-42, common problems usually focus on several aspects: Defoaming\/foam suppression effect not meeting expectations (possibly due to insufficient dosage or improper dosing method), Cloudy or delamination of the formulation (may require adjustment of compatibility with other additives in the system), Product thickening or cloudiness at low temperatures (due to the cloud point characteristics of Polyether L-42, a normal physical phenomenon, transparency can be restored by appropriate heating), Residual water marks after cleaning (it is recommended to adjust the dosage of drying agents or optimize with other additives). Polyether L-42 is a nonionic polyoxypropylene polyoxyethylene block copolymer ether, with stable chemical properties and good tolerance in acid, alkali, and high-hardness water. If abnormalities occur, first check whether the product is stored in the recommended temperature range (5°C to 35°C), whether the container is well-sealed, not moisture-affected, or contaminated with impurities. How to Obtain Technical Support from Guoli Chemical 1. Official Service Hotline and Online Customer Service: Directly call the technical service phone number published on the official website of Hai'an County Guoli Chemical Co., Ltd., or submit a problem description through the online customer service system on the corporate website. It is recommended to prepare the following information in advance: product batch number, purchase date, specific formulation system and process conditions (such as temperature, pH value, addition sequence, etc.), a description of the problem phenomenon, and photos. 2. Regional Sales Manager Contact: If purchased through a Guoli Chemical distributor or regional sales representative, you can directly contact the corresponding business personnel, and the sales manager will coordinate the technical team for one-on-one problem diagnosis. Guoli Chemical has a service network covering the country and can arrange on-site or remote support from technical engineers. 3. Sample Testing and Formulation Optimization Service: For complex formulation compatibility issues, you can send the problem sample to the Guoli Chemical Technology Center, where the R&D team will conduct component analysis, blending compatibility experiments, and provide targeted formulation adjustment suggestions. This service is usually accompanied by free technical support based on purchase volume. 4. Product Technical Data Sheet (TDS) and Safety Data Sheet (SDS): Refer to the latest version of the product technical data sheet provided with the shipment or downloaded from the company website, which contains detailed physical and chemical indicators, recommended dosage, compatibility recommendations, and typical application formula guidance, which can solve most common application problems. Usage Precautions Polyether L-42 has a flash point above 200°C and is not classified as a flammable liquid, but it should still be kept away from heat sources and open flames. It is recommended to wear chemical safety glasses and protective gloves during operation to avoid skin and eye contact. In case of skin contact, immediately wash thoroughly with plenty of soap and warm running water; in case of eye contact, rinse with flowing clean water or saline solution while holding the eyelids open for at least 15 minutes and seek immediate medical attention. Although the product is not classified as a dangerous good, good industrial hygiene practices should be followed, and the workplace should be well-ventilated. Emergency Handling Leak Handling: For small spills, absorb with inert absorbent materials (sand, vermiculite, etc.) and collect in sealed containers; for large spills, contain and prevent entry into drains, collect with explosion-proof tools and dispose of according to regulations. Fire Response: The product itself is non-flammable, but high temperatures in a fire can produce irritating fumes. Firefighters should wear positive-pressure self-contained breathing apparatus and use water mist, dry powder, or carbon dioxide extinguishing agents depending on the surrounding burning materials.

Question 3

How to purchase Polyether L-42? What is the minimum order quantity?

Accepted Answer

For specific ordering methods and minimum order quantity of Polyether L-42, please contact the sales team of Guoli Chemical directly. The product database does not currently include a fixed minimum order quantity value. Detailed Explanation Polyether L-42 (Poloxamer 122, CAS No.: 9003-11-6) is one of the core nonionic surctant products of Guoli Chemical. The price in the database is a reference quote, and the actual transaction price should be confirmed with the sales team based on order quantity, packaging specifications, and market conditions (price updated: June 10, 2026). Regarding packaging specifications, the product is available in three standardized packaging options: 50kg plastic drum, 200kg plastic drum, and IBC totes. Customers can flexibly choose according to their production needs. Generally, the minimum order quantity for chemical raw materials is related to the preferred packaging unit, such as starting with a single drum (50kg or 200kg) as the minimum order unit. However, the final confirmation should be based on the formal quotation provided by the sales team of Guoli Chemical. Order Process Suggestions Clarify requirements: Determine the quantity needed, packaging specifications (50kg/200kg/IBC tote), and expected delivery time. Contact Guoli Chemical: Reach out to the sales department via the official website of Hai'an Guoli Chemical Co., Ltd., corporate phone number, or official WeChat account to obtain the latest product quotation and technical data sheet. Request samples: For first-time cooperation or new formulation development, request a small sample for application testing to ensure compatibility with your system. Sign contract: After confirming price, delivery time, payment terms, and shipping conditions, sign a formal purchase and sales contract. Receive and inspect: Upon arrival, inspect the product appearance (should be colorless to light yellow transparent liquid), packaging integrity, and accompanying documents according to the contract standards. Technical Parameters Reference (Must Read Before Purchase) Parameter ItemValue AppearanceColorless to light yellow transparent liquid Ionic TypeNonionic Active Content (%)≥99 HLB Value8 Cloud Point (1% aqueous solution, ℃)37 Hydroxyl Value (mgKOH/g)~68 pH Value (1% aqueous solution)5.0-7.0 Density (20℃)1.03-1.05 Flash Point (Closed Cup, ℃)>200 Packaging Specifications50kg/200kg plastic drum, IBC tote Transport ClassificationNon-hazardous Precautions Polyether L-42 is slightly hygroscopic. After receipt, it should be sealed and stored promptly in a cool, dry environment at 5℃ to 35℃, avoiding prolonged exposure. This product may become cloudy or stratify in winter, which is a normal physical change. It does not affect performance after warming to room temperature and stirring evenly. Before bulk purchasing, it is recommended to request the latest batch COA (Certificate of Analysis) to verify key indicators such as hydroxyl value, cloud point, and moisture content to ensure compliance with formulation requirements. The price information above is a database reference; the actual transaction price shall be confirmed by the sales team of Guoli Chemical.

Question 4

Does Polyether L-42 meet environmental protection requirements? Can a test report be provided?

Accepted Answer

Polyether L-42 has good environmental performance and meets current mainstream environmental regulations; for test reports, it is recommended to contact the commercial department of Guoli Chemical directly. Detailed Description Polyether L-42 (Poloxamer 122) performs outstandingly in terms of environmental compliance. According to product safety and environmental data, this product has good biodegradability, high environmental compatibility, and can be decomposed by microorganisms in the natural environment without long-term residual accumulation in the ecosystem. At the same time, its bioaccumulation potential is extremely low (Log Pow In terms of toxicity assessment for aquatic organisms, Polyether L-42 shows low toxicity, meeting ecological safety requirements. According to the United Nations' Globally Harmonized System of Classification and Labelling of Chemicals (GHS) classification standards, this product is not classified as an environmental hazard substance nor as a dangerous good. These characteristics enable it to meet the basic requirements of mainstream domestic and international environmental regulations for industrial auxiliaries, making it suitable for industrial and civil formula systems with strict environmental standards. Regarding test reports, there are currently no downloadable test report files for Polyether L-42 in the database. It is recommended that you contact the Commercial Department or Technical Department of Hai'an Guoli Chemical Co., Ltd. Typically, the manucturer can provide a Certificate of Analysis (COA), Material Safety Data Sheet (MSDS\/SDS), and, if needed, third-party environmental test reports (such as biodegradability test reports, aquatic toxicity test reports, VOC content tests, etc.). Technical Parameters (Environmentally Related) ItemIndicator BiodegradabilityReadily biodegradable Bioaccumulation (Log Pow) Aquatic ToxicityLow toxicity GHS Environmental Hazard ClassificationNot classified as an environmental hazard Dangerous Goods ClassificationNon-dangerous goods FlammabilityNot flammable, flash point > 200°C Environmental Application Recommendations The environmental characteristics of Polyether L-42 make it particularly suitable for the following green formulation systems: Eco-friendly cleaning agents: Replace traditional high-foaming, poorly biodegradable surctants in low-foaming, easy-to-rinse formulations to reduce water resource consumption. Green pesticide formulations: Serve as a low-toxicity emulsifying and dispersing component to meet strict environmental safety requirements for adjuvants in modern crop protection products. Water-based coatings and inks: Act as wetting and dispersing aids in low-VOC systems to support the environmental upgrade of the coating industry. Precautions Although the product itself has good environmental performance, prevent direct discharge into water bodies without treatment during industrial use; in case of large spills, contain and dispose properly. Waste disposal should follow local environmental regulations; it is recommended to entrust qualified waste disposal agencies for treatment. To obtain specific test data or third-party certification reports, please contact Guoli Chemical's sales or technical department directly to obtain the latest and most complete official documents.

Question 5

What are the advantages of Polyether L-42 compared with other similar products?

Accepted Answer

The core advantage of Polyether L-42 among similar poloxamer/polyether products lies in its extreme defoaming and foam suppression performance, excellent low-foam wetting ability, and broad chemical compatibility. It is a highly efficient nonionic surctant specially designed for dynamic cleaning and defoaming systems. Detailed Description Polyether L-42 (Poloxamer 122, CAS: 9003-11-6) belongs to the polyoxypropylene-polyoxyethylene block copolymer ether class of nonionic surctants. Compared with common tty alcohol polyoxyethylene ethers (such as isomeric tridecanol polyether, oleyl alcohol polyether) or glycerol polyethers, the polyoxypropylene (PO) block in its molecular structure endows it with unique low-foaming characteristics and rapid foam-breaking ability. This product has an HLB value of approximately 8 and a cloud point as low as 37°C (1% aqueous solution), meaning it can precipitate from water and exert defoaming action at or slightly above room temperature – a property that conventional high-HLB surctants cannot match. Compared with other polyether products in the database, the functional positioning of Polyether L-42 is more focused: GP-330 and XS-02 are biased towards dedicated defoamer compounding, while Glycerol Polyether G-18/G-25 and Isomeric Alcohol Polyether E-1310/E-1340 mainly focus on wetting and emulsification with higher foam. Polyether L-42 is precisely at the "golden intersection of low foam + strong defoaming + efficient wetting". In dynamic systems such as automatic spray cleaning, CIP (clean-in-place) cleaning, and metalworking fluids, it can effectively inhibit foam generation while quickly spreading a water film, significantly reducing downtime for defoaming and improving production efficiency. In terms of safety and environmental protection, Polyether L-42 also has significant advantages. Its flash point is above 200°C, making it non-flammable liquid. It is not classified as a health or environmental hazard under GHS standards, and it has good biodegradability and low toxicity to aquatic organisms. This gives it a compliance advantage over some defoaming components containing silicone or solvents in food contact cleaning applications (e.g., automatic dishwasher rinse aids) and industrial scenarios with high environmental requirements. In addition, its active content is ≥99%, moisture ≤0.5%, high purity, and good batch stability, which is conducive to precise control of downstream formulations. Technical Parameters Parameter Item Polyether L-42 (Poloxamer 122) General Characteristics of Similar Products (Reference) Chemical Type Polyoxypropylene-polyoxyethylene block copolymer ether tty alcohol polyether / Glycerol polyether / Silicone-modified polyether, etc. HLB Value Approx. 8 Typically 6-16 (depending on EO number) Cloud Point (1% aqueous solution) 37°C Typically 40-100°C (higher EO products have higher cloud points) Foam Characteristics Low foam, with both defoaming and foam suppression functions Most are medium to high foam (unless specially designed) Surce Tension (1% aqueous solution) ~33 mN/m Typically 25-40 mN/m CMC (Critical Micelle Concentration) ~0.01% (w/v) Varies greatly by type Active Content ≥99% Typically 95-99% varying Appearance Colorless to light yellow transparent liquid Can be liquid to paste depending on type Acid/Alkali Stability Excellent (stable in acid, alkali, and high-hardness water) Nonionic types are generally good, but may differ under extreme conditions Flash Point (Closed Cup) >200°C Typically >100°C Pour Point Depends on molecular weight and structure Application Recommendations Polyether L-42 is best suited for the following scenarios to leverage its unique advantages: Industrial hard surce cleaning and CIP systems: Utilize low foam + strong penetration characteristics to avoid foam overflow in high-pressure spraying and circulating cleaning, recommended dosage 0.5%-3%. Automatic

Question 6

How to store polyether L-42? What is its shelf life?

Accepted Answer

Polyether L-42 should be stored in a sealed, cool, dry, and well-ventilated place. The recommended temperature is 5°C to 35°C. Under proper storage conditions, the shelf life is generally 1-2 years. Detailed Description Polyether L-42 (Poloxamer 122), as a polyoxypropylene polyoxyethylene block copolymer nonionic surctant, has relatively stable chemical properties. However, improper storage may still lead to moisture absorption, discoloration, or performance degradation. Therefore, strictly following storage guidelines is crucial for ensuring product quality and extending service life. In an ideal storage environment, the active ingredients of polyether L-42 can remain stable for a long time. This product is not classified as dangerous goods; it is non-flammable and non-explosive, but it should be kept away from heat sources and open flames. Extreme high or low temperatures may cause physical changes (such as viscosity changes, stratification, or crystallization). It is recommended to control the storage temperature between 5°C and 35°C, avoiding freezing or overheating. Regarding shelf life, the Guoli Chemical product database does not currently provide specific shelf life parameters for this product. According to industry standards for poloxamer polyether nonionic surctants, under the aforementioned storage conditions and with the container kept intact and sealed, the recommended usage period for polyether L-42 is typically 1-2 years from the date of manucture. It is advisable to follow the batch production date and expiration date information on the product packaging label, use on a first-in-first-out basis, and use the product as soon as possible after opening. Key Storage Conditions Storage RequirementSpecific Instructions Storage EnvironmentCool, dry, well-ventilated dedicated warehouse Temperature Range5°C to 35°C (prevent freezing or overheating) Container RequirementKeep tightly sealed; reseal immediately after use to prevent moisture absorption Away from SourcesKeep away from heat, sparks, open flames, and other ignition sources Isolation StorageStore separately from incompatible materials such as strong oxidizers, strong acids, and strong bases Shelf LifeGenerally 1-2 years (under sealed, compliant storage conditions); refer to product label for details Application Recommendations Polyether L-42 is widely used in low-foaming cleaners, dish drying agents, metalworking fluids, defoamers, textile auxiliaries, pesticide emulsifiers, and other fields. After opening, it is recommended to use the product within 6 months. Each time after use, the container should be sealed immediately to avoid prolonged exposure to air and moisture absorption. If the product shows abnormal phenomena such as turbidity, stratification, or odor, discontinue use and conduct quality re-inspection. Precautions During operation, it is recommended to wear chemical safety goggles and protective gloves to avoid direct contact with skin and eyes. The workplace should be well-ventilated to avoid accumulation of spray or mist. In case of leakage, small spills should be absorbed with inert absorbent materials (sand, vermiculite, etc.) for recovery; large spills should be contained to prevent entry into drains, collected, and transferred to spare containers. Waste disposal should comply with local environmental regulations. The product has good biodegradability, but it should not be discharged directly into water bodies. This product is not dangerous goods and has no special transportation restrictions. However, avoid packaging damage and extreme temperatures during transport.

Question 7

What safety precautions should be taken when using Polyether L-42?

Accepted Answer

Polyether L-42 is a non-hazardous substance with relatively high overall safety, but basic industrial hygiene practices, especially regarding eye and skin protection, workplace ventilation, and proper storage conditions, should still be followed during use. Detailed Description Polyether L-42 is a high molecular weight polyether polyol. According to current transportation and hazardous chemical management regulations, it is not classified as a dangerous good. Its closed-cup flash point is above 200°C, so it is not classified as a flammable liquid, has no explosive properties, and is not an oxidizer. Based on the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS) criteria, this product is not classified as a health or environmental hazard. Its acute toxicity, skin corrosion/irritation, serious eye damage/irritation, respiratory or skin sensitization, germ cell mutagenicity, carcinogenicity, reproductive toxicity, and other endpoints do not meet the classification criteria. Although this product has relatively high safety, as a fine chemical product, general safety specifications for industrial chemicals should still be strictly followed during handling. It is recommended to wear chemical safety goggles, protective gloves, and appropriate work clothing to avoid direct skin and eye contact. The workplace should be well-ventilated, using local exhaust or general ventilation to prevent aerosol accumulation. During operation, handle gently to avoid generating sprays or droplets, and wash hands thoroughly after operation. From an environmental safety perspective, this product has good biodegradability, no bioaccumulation (Log Pow < 3), and exhibits low toxicity to aquatic organisms, meeting ecological safety requirements. In the event of a spill, inert absorbent materials (such as sand, vermiculite, or universal absorbent pads) can be used for cleanup, and precautions should be taken to prevent the spill from entering drains or water bodies. Technical Parameters Safety IndicatorParameter Description Hazard ClassificationNon-hazardous Closed-Cup Flash Point>200°C (Not classified as flammable liquid) ExplosivenessNone GHS Health Hazard ClassificationNot classified (all toxicity endpoints do not meet classification criteria) BiodegradabilityReadily biodegradable BioaccumulationNone (Log Pow < 3) Aquatic ToxicityLow toxicity Application Recommendations Polyether L-42 is widely used in industrial and household low-foaming cleaners, dish rinse aids, metalworking fluids, defoamers, paint wetting and dispersing agents, textile pretreatment auxiliaries, and pesticide emulsifiers. Regardless of the application scenario, the above safety operating procedures should be followed. Especially in processes with a higher risk of aerosol generation, such as spray cleaning or high-pressure spraying, enhanced ventilation and protection should be ensured to avoid long-term inhalation of aerosols. Personal Protection Measures Eye Protection: Wear chemical safety goggles to prevent liquid splashes into the eyes. Hand Protection: Wear protective gloves to avoid prolonged skin contact. Body Protection: Wear appropriate work clothing. Contaminated clothing should be cleaned before reuse. Respiratory Protection: Operate in well-ventilated areas; use local exhaust ventilation if necessary. Storage Precautions Store in a cool, dry, and well-ventilated dedicated warehouse. Recommended storage temperature range: 5°C to 35°C. Avoid freezing or overheating to prevent changes in product properties. Keep containers tightly closed to prevent moisture absorption and foreign matter entry; reseal immediately after use. Keep away from heat sources, sparks, open flames, and other ignition sources. Store separately from incompatible substances such as strong oxidizers, strong acids, and strong bases. First Aid Measures Skin Contact: Immediately remove contaminated clothing and rinse thoroughly with plenty of soap and flowing lukewarm water. If irritation persists, seek medical attention. Eye Contact: Immediately rinse with plenty of flowing water or saline solution, holding eyelids open, for at least 15 minutes. Seek immediate medical attention. Inhalation: Move to fresh air immediately and maintain an open airway. If respiratory discomfort or persistent coughing occurs, seek medical attention immediately. Ingestion: Rinse mouth with water, do NOT induce vomiting. Seek immediate medical attention and show the container or Safety Data Sheet.

Question 8

How to use polyether L-42? What is the recommended dosage?

Accepted Answer

The usage of polyether L-42 varies depending on the application scenario. It is usually added directly or after pre-dilution; the recommended dosage is generally between 0.1% and 5% of the total formulation, but the specific amount should be determined through experiments based on process requirements. Detailed Description Polyether L-42 (Poloxamer 122) is a nonionic polyoxypropylene polyoxyethylene block copolymer. At room temperature, it is a colorless to light yellow transparent liquid with an HLB value of about 8 and a cloud point of 37°C for a 1% aqueous solution. It is easily soluble in water. In practical use, it can be directly added to the aqueous or oil phase system with stirring, or pre-diluted with warm water to a 10%~20% solution before feeding to cilitate rapid and uniform dispersion. For high-viscosity formulations, it is recommended to add it slowly under stirring to avoid local high concentrations. This product has strong defoaming and foam-inhibiting functions and excellent compatibility. It can be used synergistically with various anionic, cationic, and nonionic surctants. In compounding, it is usually used as a functional auxiliary with the main surctant. It is recommended to add it in the later stage of formulation development to reduce foam interference caused by excessive shearing during processing. Recommended Dosage in Various Application Fields Application FieldRecommended Dosage (Percentage of Total Formulation)Usage Method Low-foam hard surce cleaner1.0% ~ 3.0%Add directly to the water phase with stirring until dissolved Dish rinse aid/drying agent5.0% ~ 20.0% (active ingredient)Pre-dilute before adding, as a core drying component Metalworking fluid/cutting fluid0.5% ~ 2.0%Add to the water phase or directly into the concentrate Industrial defoamer component10.0% ~ 30.0%As the active defoaming substance, compounded with other hydrophobic particles Coating/ink wetting and dispersing agent0.1% ~ 0.5%Add during the grinding stage to assist pigment dispersion Textile pretreatment wetting agent0.5% ~ 2.0 g/L (working solution)Add directly to the scouring or bleaching bath Pesticide emulsifying and dispersing agent2.0% ~ 5.0%Add to the oil or water phase to participate in emulsification Data Note: The above dosage ranges are general reference values based on industry experience (source: Guoli Chemical Product Application Database). The actual optimal dosage must be verified through small-scale and pilot tests. Application Suggestions Polyether L-42's low-foam characteristics make it particularly suitable for dynamic cleaning scenarios such as automatic spray cleaning, CIP (clean-in-place) cleaning, and high-pressure cleaning. In dish rinse aid formulations, it is recommended to compound with nonionic wetting agents and control the use concentration at 0.1~0.5 g/L (based on rinse water) to achieve rapid and streak-free drying. When used as a defoamer component, it can be combined with hydrophobic silica, silicone, etc., for synergistic enhancement. Precautions Dissolution operation: The viscosity of this product at room temperature is about 250 mPa·s, and it is slightly hygroscopic. After feeding, stir thoroughly until fully dissolved to avoid the formation of "fish eyes" or gel particles. Temperature control: The 1% aqueous solution has a cloud point of 37°C. In high-temperature systems (e.g., textile bleaching bath, high-temperature cleaning), precipitation and turbidity may occur, which is reversible; the solution becomes clear again upon cooling, and the performance is not affected. Incompatibility: Avoid direct mixing with strong oxidants (e.g., high-concentration sodium hypochlorite, hydrogen peroxide stock solution). It is recommended to dilute with plenty of water before compounding. Storage requirements: Recommended storage temperature is 5°C to 35°C. After opening, reseal to prevent moisture absorption. Safety protection: It is recommended to wear protective gloves and goggles during operation to avoid prolonged direct contact with skin. This product is not a hazardous substance and has good environmental compatibility.

Question 9

In which industries and processes is Polyether L-42 mainly applied?

Accepted Answer

Polyether L-42, with its low-foaming, strong wetting, and excellent emulsifying and dispersing properties, is widely used in various industries including industrial cleaning, metal processing, textile printing and dyeing, pesticide formulations, coatings and inks, and defoamers. Detailed Description Polyether L-42 (Poloxamer 122) is a polyoxypropylene polyoxyethylene block copolymer ether type nonionic surctant. Its molecular structure is controllable, safe and mild, with strong defoaming and foam inhibition functions, as well as excellent emulsifying, wetting, and dispersing capabilities. This product maintains high stability in acidic, alkaline, and hard water environments, and can work well with various anionic, cationic, and nonionic additives, allowing flexible application in a variety of industrial formulation systems. In the cleaning industry, Polyether L-42 stands out for its low-foaming characteristics and rapid spreading ability, especially suitable for dynamic systems such as automatic spray cleaning equipment and CIP (Clean-in-Place) cleaning, significantly reducing equipment downtime and maintenance costs caused by foam. In the metalworking field, it combines both lubrication and cooling effects, effectively suppressing a large amount of foam generated during the circulation of cutting fluids, ensuring high-speed processing stability and workpiece precision. In addition, Polyether L-42 acts as an efficient wetting and dispersing agent in coatings, inks, and adhesive systems, reducing dynamic surce tension, enhancing the resin's ability to encapsulate pigments and fillers, and improving color development uniformity and adhesion. In pesticide formulations and textile pretreatment, it serves as an emulsifying and dispersing component and a penetration promoter, respectively, significantly improving the utilization rate of active ingredients and processing effects. Main Application Industries and Processes Application Industry Specific Process/Use Core Function Industrial and Household Cleaning Low-foaming and foam-controlled hard surce cleaners, automatic spray cleaning, CIP cleaning Low-foam wetting, rapid penetration and oil removal, easy rinsing without residue Dishwashing Automatic dishwashers, rinse aids for tableware Rinsing aid, reducing intercial tension, eliminating water spots, improving gloss of utensils Metalworking Metalworking fluids, cutting fluids, grinding fluids, industrial hard surce cleaning Lubrication and cooling, defoaming and foam inhibition, preventing pump cavitation, ensuring processing accuracy Defoamer Manucturing Core active component of defoamers and deaerators Rapid bubble breaking, long-lasting foam suppression, suitable for fermentation, papermaking, water treatment, etc. Coatings/Inks/Adhesives Wetting and dispersing agent, pigment dispersion aid Reducing surce tension, enhancing wetting and encapsulation, improving color development and adhesion, suppressing microfoam Textile Printing and Dyeing Pretreatment scouring agent, bleaching penetration aid Promoting uniform diffusion of alkali/bleach liquor, removing natural waxes, improving capillary effect and whiteness Pesticide Formulations Emulsifying and dispersing component for emulsifiable concentrates, microemulsions, and suspension concentrates Emulsifying and dispersing, enhancing wetting, spreading and adhesion of spray liquid, improving active ingredient utilization Application Recommendations In actual formulation design, it is recommended to adjust the dosage of Polyether L-42 according to the specific process requirements for foam control and wetting. For high-pressure spray cleaning and CIP systems, it can be used as the core low-foam surctant; in defoamer formulations, it can be used directly as an active substance or combined with other hydrophobic components to enhance the synergistic defoaming and foam inhibition effect. In pesticide formulations, Polyether L-42 has both emulsifying and dispersing functions, which can simplify the formulation and reduce the variety of additives. This product has good compatibility with anionic, cationic, and nonionic additives, offering excellent formulation compatibility. It performs particularly stably in high-temperature and high-alkali processes such as metalworking fluids and textile pretreatment, making it an ideal choice for formulation engineers. Precautions Recommended storage temperature range: 5°C to 35°C, prevent freezing or overheating to avoid changes in product properties. It is recommended to wear chemical safety goggles and protective gloves during operation, avoid contact with skin and eyes. Storage containers must be kept sealed to prevent moisture absorption and ingress of foreign matter. This product is not classified as dangerous goods, is non-flammable, has no explosion risk, has good biodegradability, and has low toxicity to aquatic organisms. In case of leakage, collect with inert absorbent materials and dispose of waste in accordance with local regulations.

Question 10

What are the physical and technical parameters of Polyether L-42?

Accepted Answer

Polyether L-42 is a non-ionic low-foaming surctant with an HLB value of approximately 8. At room temperature, it appears as a colorless to light yellow transparent liquid with balanced comprehensive performance. Detailed Description Polyether L-42 (Poloxamer 122/CAS: 9003-11-6) is a polyoxyethylene-polyoxypropylene block copolymer produced by Guoli Chemical. The specific ratio of hydrophobic polypropylene oxide (PO) segments to hydrophilic polyethylene oxide (EO) segments in its molecular structure imparts unique low-foaming characteristics and a moderate hydrophilic-lipophilic balance value. This makes it particularly effective in applications that require rapid foam breaking and suppression without compromising wetting and emulsifying capabilities. This product is a liquid with a high active content of ≥99%, exhibiting good fluidity and operability (pour point below -20°C). It is highly stable to acids, alkalis, and hard water, and has broad compatibility, working synergistically with various anionic, cationic, and non-ionic additives. In formulations such as metalworking fluids, automatic dishwasher rinse aids, and low-foaming industrial cleaners, it not only serves as a core defoaming/foam suppression component but also effectively reduces dynamic surce tension, enhancing the spreading rate of water films to achieve a streak-free, st-drying effect. Polyether L-42 has high safety, good biodegradability, and exhibits low toxicity to aquatic organisms. It is classified as a non-hazardous substance (flash point >200°C). Under standard operating conditions, it is friendly to personnel and the environment, making it safe for use in both household and industrial formulations. Technical Parameters ParameterTechnical IndexRemarks/Test Conditions AppearanceColorless to light yellow transparent liquidVisual inspection Ionic TypeNon-ionic- HLB Value8- Active Content≥99%- Molecular Weight~1630- Cloud Point37°C1% aqueous solution Density1.03 - 1.05 g/cm³25°C Kinematic Viscosity~250 mPa·s25°C pH Value5.0 - 7.01% or 5% aqueous solution Surce Tension~33 mN/m1% aqueous solution Critical Micelle Concentration (CMC)~0.01% (w/v)- Hydroxyl Value~68 mgKOH/g- Acid Value≤0.5 mgKOH/g- Moisture Content≤0.5%- Flash Point>200°CClosed cup Pour Point- Refractive Index1.452 - 1.45620°C Iodine Value≤1 gI₂/100g- SolubilityEasily soluble in water, ethanol, ether, etc.- Foaming PropertyLow foaming- Heavy Metal Content≤5 ppm- Arsenic Content (As)≤1 ppm- Application Recommendations As a typical low-foaming surctant, the recommended dosage should be adjusted based on specific formulations and processes. The following are general industry reference ranges: Automatic Dishwasher Rinse Aid: As a core rinse ingredient, the recommended addition amount is 5% - 20% of the total formulation, significantly accelerating water film leveling for streak-free, st drying. Low-Foaming Industrial and Household Hard Surce Cleaners: Combined with other additives, the recommended dosage is 2% - 8%, particularly suitable for dynamic rinse systems such as high-pressure spray and CIP (Clean-in-Place) cleaning. Metalworking Fluids/Cutting Fluids: As a lubricating, cooling, and low-foaming component, it is recommended to add 3% - 10% in the formulation, effectively suppressing foam generation in circulation and preventing pump cavitation. Defoamer Compounding: Can be used as a core defoaming active ingredient, with the dosage ranging from 10% to direct use as a pure product depending on defoaming requirements. Textile Scouring/Penetrating Agent: Addition amount of 1 - 5 g/L accelerates the penetration of working solution between fibers, improving capillary effect and whiteness. Precautions According to the safety technical data provided by Guoli Chemical, please note the following when using Polyether L-42: Operational Protection: Although classified as non-hazardous, it is recommended to wear chemical safety goggles and protective gloves to avoid direct contact with skin and eyes. Storage Conditions: Store in a cool, dry, and well-ventilated warehouse at temperatures between 5°C and 35°C. Keep containers tightly sealed to prevent moisture absorption and contamination by foreign matter. Incompatibilities: Although stable itself, it should be stored separately from incompatible substances such as strong oxidizers, strong acids, and strong alkalis to avoid unnecessary contact. Low-Temperature Fluidity: The pour point is below -20°C, allowing normal use in most regions during winter. If solidification occurs under extreme low temperatures, it can return to liquid state after natural warming at room temperature without affecting performance.

Polyether L-42

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Property	Value
CAS No.	9003-11-6
Molecular Formula	HO(C2H4O)a(C3H6O)b(C2H4O)cH
Appearance	Colorless to pale yellow liquid
Ionic Type	Nonionic
Avg. Molecular Weight	~1630
Cloud Point	37 (1%aq. soln.)
Active Content	≥99
pH Value(1%)	5.0-7.0
pH Value(5%)	5.0-7.0
Iodine Value	≤1
Solubility	Readily soluble in water, ethanol, ethyl ether etc.
Surface Tension	~33 (1%aq. soln.)
CMC	~0.01 (%, w/v)
Acid Value	≤0.5
Saponification Value	≤1
Hydroxyl Value	~68
Moisture	≤0.5
Density	1.03-1.05
Kinematic Viscosity	~250 (25°C)
Refractive Index	1.452-1.456 (20°C)
Flash Point	>200 (closed cup)
Hygroscopicity	Slightly hygroscopic
Chemical Stability	Stable at ambient temperature and pressure
Amine Value	≤1
Penetration	Good
Foam Property	Low foam
Alkali Resistance	Stable
Unsaturation	≤0.1
Viscosity	~250 mPa·s (25°C)
Melting Point	Liquid; pour point <-20°C
Low Shear Viscosity	~250
Solid Content	≥99
Free Alcohol	≤0.5
Heavy Metal	≤5
Arsenic	≤1

Polyether L-42

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Packaging and Storage

Polyether/Poloxamer Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

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