Question 1

Is polyether L-62 harmful to the human body? Does it have an impact on the environment?

Accepted Answer

Polyether L-62 is a low-toxicity chemical, but it is irritating and poses certain hazards to both the human body and the environment, requiring standardized operation and proper management. Detailed Explanation Polyether L-62 (Poloxamer 182) is a non-ionic surctant. From a toxicological perspective, its acute toxicity is relatively low—the acute oral LD₅₀ in rats is greater than 2000 mg/kg, and current studies have not shown it to be mutagenic, carcinogenic, or reproductive toxic. This means that under normal industrial use conditions, with basic protective measures, the risk of severe systemic poisoning to humans is low. However, polyether L-62 has clear irritant effects on the skin, eyes, and respiratory tract. According to GHS classification, it belongs to skin irritation category 2 (H315), serious eye damage/eye irritation category 2A (H319), and specific target organ toxicity - single exposure category 3 (respiratory tract irritation, H335). Direct contact may cause skin redness, swelling, and itching; splashing into the eyes can lead to severe irritation and damage; inhalation of its vapor or mist may cause coughing, throat discomfort, and other respiratory irritation symptoms. In terms of the environment, polyether L-62 is classified as aquatic chronic toxicity category 3 (H412), indicating that it is harmful to aquatic life with long-lasting effects. Although its biodegradability is relatively good, large-scale discharge into water bodies may still adversely affect aquatic ecosystems such as fish and algae. Therefore, wastewater containing this product should not be directly discharged into natural water bodies but must be properly treated. Technical Parameters ItemParameter Acute oral toxicity LD₅₀ (rat)> 2000 mg/kg MutagenicityNot observed CarcinogenicityNot observed Reproductive toxicityNot observed Skin irritation (GHS classification)Category 2, H315 Eye irritation (GHS classification)Category 2A, H319 Respiratory tract irritation (GHS classification)Category 3, H335 Aquatic chronic toxicity (GHS classification)Category 3, H412 Flash point (closed cup)> 150 °C ExplosivenessNone Application Recommendations Given the above hazard characteristics, when using polyether L-62 in applications such as metalworking fluids, industrial cleaning agents, textile auxiliaries, cosmetics, and pesticide adjuvants, it is recommended to: Engineering controls: Operate in well-ventilated areas or environments equipped with local exhaust ventilation systems to reduce the risk of inhaling vapor/mist. Personal protection: Wear chemical safety protective gloves, protective goggles/ce shields, and, if necessary, wear dust and poison masks. Formulation design: The addition amount of polyether L-62 in end products is usually low (generally 0.5%~5%), and under normal use conditions, the hazards of the finished product to humans and the environment are significantly reduced. Wastewater treatment: Industrial wastewater containing this product should be treated through biochemical or physicochemical processes to meet discharge standards before being released, avoiding direct entry into natural water bodies. Precautions If skin contact occurs, immediately remove contaminated clothing and rinse thoroughly with plenty of running water; if irritation persists, seek medical attention. If it gets into eyes, lift eyelids and rinse with running water or saline for at least 15 minutes, remove contact lenses if present and continue rinsing; if irritation persists, seek medical attention. If inhaled and feeling unwell, quickly move to fresh air and keep the airway unobstructed; if feeling unwell, seek medical attention. Store in a cool, dry, well-ventilated warehouse, away from fire and heat sources, keep containers sealed, and store separately from oxidizing agents and acids. It is combustible in the presence of open flames or high heat; appropriate extinguishing media include water spray, foam, dry powder, carbon dioxide, or sand.

Question 2

What should I do if problems occur during the use of Polyether L-62? How to get technical support?

Accepted Answer

If problems occur during the use of Polyether L-62, first handle the on-site situation according to safety emergency measures, then obtain professional technical support through the official channels of Guoli Chemical Detailed Description Polyether L-62 (CAS No.: 9003-11-6) is a non-ionic surctant produced by Hai'an County Guoli Chemical Co., Ltd., belonging to the Poloxamer 182 series. When encountering problems during use, handle them step by step based on the type of issue: For emergencies involving personal safety, immediately implement emergency response measures; for technical doubts regarding product performance or formulation processes, contact the Guoli Chemical technical team for professional support. Common problems during use can be roughly divided into the following categories: First, abnormal product appearance (such as turbidity, stratification, discoloration), usually related to improper storage conditions (moisture, high temperature, or direct sunlight). Check whether the storage environment meets the requirements of cool, dry, ventilated, and sealed conditions; second, poor application effects (such as insufficient emulsifying power, unsatisctory foam control), often related to formulation compatibility, dosage, or water quality. The HLB value of Polyether L-62 is about 7, and the cloud point is about 32°C (1% aqueous solution). It is a low-foaming surctant, and its performance in different systems is greatly affected by temperature and compatible components; third, safety accidents such as skin or eye contact or inhalation, requiring immediate treatment according to the first aid measures in the product safety data sheet. Recommended ways to obtain technical support from Guoli Chemical include: Calling the company's official service phone number (subject to the official website release), providing the product batch number, application scenario, and specific problem description. The technical engineer will conduct targeted analysis; detailed problem descriptions and formulation information can also be sent via email to the company's technical department mailbox; if necessary, apply for sending samples for laboratory retesting or formulation optimization. It is recommended to prepare the following information before contacting technical support: Product batch number, purchase date, usage formulation, operating conditions (temperature, pH, addition sequence), and specific manifestation of the problem, so that technical personnel can quickly identify the cause. Emergency Treatment Quick Reference Table Contact TypeEmergency Treatment MeasuresFollow-up Actions Skin ContactRemove contaminated clothing and rinse thoroughly with plenty of running waterIf irritation persists, seek medical attention (P332+P313) Eye ContactLift eyelids, rinse with running water or saline for at least 15 minutes; continue rinsing after removing contact lensesIf eye irritation persists, seek medical attention (P337+P313) InhalationMove quickly to fresh air and keep airway unobstructedIf breathing difficulty, give oxygen; if breathing stops, perform artificial respiration immediately and seek medical attention IngestionDrink plenty of warm water and induce vomitingSeek medical attention immediately Spill (Small)Absorb with sand, vermiculite, or other inert materials and collect in a sealed containerDispose of waste in accordance with local regulations Spill (Large)Build dikes or dig pits to contain, transfer with a pump to a dedicated collectorRecycle or transport to waste treatment site Common Application Problem Troubleshooting Guide Poor emulsification effect: Check whether the amount of Polyether L-62 added is sufficient, whether the system pH is within the applicable range (1% aqueous solution pH 5.0-7.5), and whether the temperature exceeds the cloud point (about 32°C). Exceeding the cloud point will cause the product to precipitate from water, losing its emulsifying function. Abnormal increase in foam: Polyether L-62 itself is a low-foam product. If there is excessive foam in the system, check whether it is compounded with other high-foam surctants or whether contaminants are introduced into the system. The proportion of Polyether L-62 can be appropriately increased to utilize its defoaming characteristics. Product becomes turbid or stratified: May be due to low storage temperature (pour point about -20°C) causing viscosity or solidification. Reduced fluidity at low temperatures is normal; rewarm at room temperature and stir evenly before use. If still abnormal after rewarming, the product may have deteriorated due to moisture, discontinue use and contact the supplier. Precautions Polyether L-62 is flammable when exposed to open flame and high heat (flash point > 150°C). Use and storage areas should be kept away from ignition sources and heat sources. Wear protective gloves, protective goggles, and protective mask during operation (P280), and avoid inhaling vapors or sprays (P261). GHS classification of this product: Skin irritation (H315), Serious eye irritation (H319), Respiratory irritation (H335). Thoroughly wash after handling (P264). Harmful to aquatic life with long-lasting effects (H412). Do not discharge waste liquid containing this product directly into water bodies. If using at high temperatures, pay attention to the cloud point limitation (about 32°C). Surctant performance significantly decreases when exceeding the cloud point. The response time for technical support depends on the complexity of the issue. For emergency safety matters, seek medical attention or contact local emergency departments first.

Question 3

How to purchase polyether L-62? What is the minimum order quantity?

Accepted Answer

Polyether L-62 can be purchased through the direct sales channel of Haian Guoli Chemical Co., Ltd. For specific prices and minimum order quantities, please contact the sales team for confirmation. Conventional packaging specifications include 50kg plastic drums, 200kg plastic drums, and IBC totes. Detailed Description Polyether L-62 (CAS No.: 9003-11-6, also known as Poloxamer 182\/Pluronic L-62) is one of the core products of Guoli Chemical. It is a nonionic polyoxyethylene polyoxypropylene block copolymer. The product appears as a colorless to light yellow transparent liquid, with excellent emulsifying, wetting, dispersing, and low-foaming properties. It is widely used in metalworking fluids, industrial cleaners, defoamers, textile auxiliaries, cosmetics, and pharmaceuticals. According to Guoli Chemical's database information, the current quotation for this product is to be negotiated\/discussed in person. The actual transaction price is affected by ctors such as order quantity, payment method, and market conditions, and requires direct communication with the sales team to obtain the latest quotation. The database does not explicitly indicate the minimum order quantity (MOQ). Typically, the minimum order for chemical raw materials is based on a single drum package. Please confirm with the sales personnel for details. Technical Parameters ItemParameter Ion TypeNonionic AppearanceColorless to light yellow transparent liquid CAS No.9003-11-6 Molecular WeightApprox. 2500 Effective Content≥99% HLB Value7 Cloud Point (1% Aqueous Solution)Approx. 32°C pH Value (1% Aqueous Solution)5.0-7.5 Hydroxyl Value40-50 mgKOH\/g Density1.03~1.05 g\/cm³ Kinematic Viscosity (25°C)Approx. 400 mm²\/s Flash Point (Closed Cup)>150°C Pour PointApprox. -20°C Packaging Specifications50kg plastic drum \/ 200kg plastic drum \/ IBC tote Purchase Process Suggestions If you need to purchase polyether L-62, it is recommended to follow the steps below: Contact the sales team: Contact the sales department directly via Guoli Chemical's official website, corporate email, or phone to obtain the latest quotation and confirm the minimum order quantity. Clarify requirements specifications: Inform the application field of the product, estimated annual usage, and packaging preference (50kg\/200kg\/IBC tote) in advance so that the sales personnel can provide an accurate solution. Request samples for testing: For first-time cooperation or new formulation development, you can request free samples for small-scale trial verification to ensure the product meets process requirements. Sign a contract: After confirming the price, delivery date, payment method, and transportation plan, sign a formal purchase and sales contract. Arrange logistics: Guoli Chemical supports various logistics methods and can arrange self-pickup, dedicated line logistics, or express delivery according to customer needs. Precautions The above product price is for reference only. The actual price is subject to the latest quotation from the sales team. Polyether L-62 has certain hygroscopicity. During storage, the container should be kept sealed and stored in a cool, dry, and well-ventilated warehouse. It is recommended to wear protective gloves and goggles during operation to avoid direct contact with skin and eyes (GHS classification: skin irritation H315, eye irritation H319). If it is to be used in pharmaceutical or food-related fields, please inform in advance so that product batches meeting corresponding regulatory grades can be provided.

Question 4

Does polyether L-62 meet environmental requirements? Can you provide a test report?

Accepted Answer

Polyether L-62 contains chronic aquatic toxicity (H412) and is not a fully environmentally friendly product; regarding test reports, no specific files are currently available in the database. It is recommended to contact Guoli Chemical directly for further information. Detailed Explanation Polyether L-62 (Poloxamer 182) has certain limitations in terms of environmental performance. According to GHS classification, this product is classified as Chronic Aquatic Toxicity Category 3 (H412), meaning "Harmful to aquatic life with long-lasting effects." This indicates that if the product is discharged directly into natural water bodies without treatment, it may have potential long-term negative impacts on aquatic ecosystems. In terms of environmental compliance, polyether L-62 is not a prohibited substance, but users must properly manage waste liquid in accordance with environmental requirements during use and disposal, and strictly avoid direct discharge. From a positive perspective, polyether L-62 has the following vorable environmental characteristics: non-mutagenic, non-carcinogenic, and non-reproductive toxic; low acute oral toxicity (LD₅₀ > 2000 mg/kg); the product does not contain harmful components such as free phosphoric acid or tertiary amines. Additionally, this product is a nonionic surctant and, by structure, does not contain APEO (alkylphenol ethoxylates) or other strictly restricted components. Under normal use conditions, if enterprises comply with local environmental regulations for wastewater treatment and waste disposal, the environmental risks associated with polyether L-62 can be controlled. Regarding test reports, there are currently no readily available ROHS, REACH, or other third-party environmental test reports for download in the Guoli Chemical product database. To obtain formal environmental compliance documents, SGS test reports, or other certification materials, please contact the Guoli Chemical sales or technical support team directly. They will provide the corresponding documentation based on your specific application and local regulatory requirements. Environmental Compliance Assessment Points Assessment ItemStatusDescription GHS ClassificationH412Chronic Aquatic Toxicity Category 3, harmful to aquatic life with long-lasting effects APEO ContentNot presentNonionic block copolymer, does not contain alkylphenol ethoxylate structure Heavy Metals (Total)≤20 mg/kgMeets general industrial product requirements; need to confirm if it meets specific industry limit standards Arsenic Content≤2 mg/kgVery low content Mutagenicity/Carcinogenicity/Reproductive ToxicityNot classifiedExisting toxicological data does not indicate such hazards Acute Toxicity (Oral)LD₅₀ > 2000 mg/kgLow acute toxicity BiodegradabilityData not availableFurther testing required to confirm Test Reports (ROHS/REACH, etc.)Not available for downloadPlease contact Guoli Chemical to obtain Application Recommendations In application areas with high environmental compliance requirements (such as products exported to the EU or green-label products), the following measures are recommended: confirm regulatory requirements of the target market with Guoli Chemical in advance; if necessary, commission a third-party testing agency to conduct environmental compliance assessments of the final formulation; in applications such as industrial cleaning and metalworking fluids, use wastewater treatment cilities to ensure that waste liquid is discharged up to standard; in areas with direct environmental exposure, such as pesticides and cosmetics, pay special attention to the registration or labeling requirements that may arise from the H412 classification. Precautions Strictly avoid discharging waste liquid containing polyether L-62 directly into natural water bodies without treatment. Ensure proper sealing during storage to prevent leakage into soil or groundwater environments. If ROHS, REACH compliance declarations or SGS test reports are required, please contact the Guoli Chemical technical service team directly. This product is not classified as hazardous waste, but disposal should comply with local environmental regulations.

Question 5

What are the advantages of Polyether L-62 compared to other similar products?

Accepted Answer

The core advantage of Polyether L-62 lies in its unique combination of low HLB value (approximately 7) and low cloud point (approximately 32°C), which provides more precise matching for industrial scenarios requiring strong defoaming and foam suppression performance as well as low-temperature controllable emulsification capabilities compared to similar products. Detailed Explanation Polyether L-62 (Poloxamer 182) belongs to the Pluronic L series and is one of the more lipophilic members. Its polyoxyethylene (EO) block content is about 20%, and its polyoxypropylene (PO) block content is about 80%. Compared to L-61 (approximately 10% EO) in the same series, which has a lower EO content, L-62 offers better water dispersibility, forming stable emulsions in water without requiring a large amount of co-solvent, significantly improving ease of use. Compared to L-64 (approximately 40% EO), which has a higher EO content, L-62 has more prominent low-foaming characteristics, making it especially suitable for spray cleaning and high-pressure operation systems with strict foam control requirements. In practical applications, the cloud point of L-62 is about 32°C (1% aqueous solution), which lls within the common operating temperature range of many industrial cleaning and metalworking fluids. When the operating temperature exceeds the cloud point, L-62 precipitates from the aqueous phase, and its surce activity drops sharply, creating a unique "cloud point defoaming effect"—a temperature-responsive self-regulating defoaming capability that is not available in similar polyethers with higher EO content. Technical Parameters ParameterPolyether L-62Comparison Description Ionic TypeNon-ionicWidely compatible with acids, bases, and electrolytes HLB ValueApproximately 7Low, suitable for W\/O emulsification and defoaming applications Cloud Point (1% aqueous solution)Approximately 32°CLow cloud point, with built-in thermal defoaming function Molecular WeightApproximately 2500Medium molecular weight, balancing permeability and film strength Foam CharacteristicsLow foamingSuperior to similar polyethers with higher EO content Active Content≥99%High purity, offering great formulation flexibility Surce Tension (0.1%, 25°C)Approximately 40 mN\/mGood wetting and spreading ability Pour PointApproximately -20°CStrong low-temperature fluidity, convenient for winter use Flash Point (Closed Cup)>150°CHigher safety ctor in high-temperature processing scenarios Application Recommendations The core logic for choosing Polyether L-62 is "low-foaming priority"—when your application scenario has extremely low tolerance for foam (such as high-pressure spraying, rapid circulation pumping, closed systems), and the operating temperature may frequently exceed 30°C, L-62 is the optimal choice. Specific scenarios include: formulation of metal cutting fluids and grinding fluids, construction of water-based defoamer concentrates, textile pretreatment scouring agent formulations, and low-foaming emulsifying aids for pesticide soluble concentrates. If your application requires complete water solubility at room temperature and high emulsification stability, it is recommended to choose similar products with higher HLB values, such as Polyether L-64 or L-44. Precautions L-62 is in a dispersed or emulsion state in cold water. It is recommended to thoroughly mix it with water by stirring before use. When the formulation temperature exceeds the cloud point of 32°C, L-62 will precipitate and lose some of its surce activity. A small amount of high-HLB co-emulsifier can be added to optimize high-temperature stability. Although this product is a low-toxicity surctant, basic operating procedures should still be followed: wear gloves and safety goggles to avoid direct contact with skin and eyes. Store away from high temperatures (>50°C) and direct sunlight to prevent polymer chain degradation that may affect performance.

Question 6

How to store Polyether L-62? What is the shelf life?

Accepted Answer

Polyether L-62 should be stored sealed in a cool, dry, and well-ventilated place, away from fire and heat sources; the shelf life is not explicitly marked in the database, but under recommended storage conditions, it can typically be stored stably for 2 years. Detailed Instructions Polyether L-62 (Poloxamer 182) is a non-ionic surctant, appearing as a colorless to light yellow transparent liquid, and is chemically stable under normal storage conditions. Proper storage relies on moisture prevention, fire prevention, and high temperature avoidance. This product has certain hygroscopicity; contact with moisture in the air may cause product quality deterioration, so container sealing is crucial. Regarding shelf life, there is no specific marking for this parameter in the Guoli Chemical product database. According to common industry practices in the chemical sector and the chemical stability of this product, unopened original packaging of Polyether L-62 can typically be stored stably for 2 years under strict adherence to recommended storage conditions. Users are advised to follow the "First In, First Out" inventory management principle and check for any abnormal changes in product appearance (such as turbidity, stratification, or significant color deepening) before use. Storage Condition Requirements Storage Element Specific Requirement Ambient Temperature Cool environment, avoid high temperatures (recommended storage temperature below 40°C) Ambient Humidity Dry, prevent moisture (product is hygroscopic) Ventilation Condition Good ventilation to avoid accumulation of vapor or mist Lighting Avoid direct sunlight Fire Source Management Keep away from ignition sources and heat (flash point > 150°C, combustible when exposed to open flame or high heat) Container Sealing Keep container sealed; reseal promptly after opening Prohibited Mixed Storage Should be stored separately from oxidizing agents, acids, etc., and avoid mixing Packaging Specifications 50kg plastic drum \/ 200kg plastic drum \/ IBC tote Storage Area Configuration Storage area should be equipped with spill emergency response equipment and suitable containment materials Usage Recommendations Opened Polyether L-62 should be used up as soon as possible. If it cannot be used up in one go, immediately reseal the container after each use to prevent moisture absorption and contamination. Use dry and clean tools when withdrawing material. If the product shows significant color deepening, turbidity, or stratification, it is recommended to stop use and contact the Guoli Chemical technical department to confirm quality. Notes The product pour point is approximately -20°C. Solidification or thickening may occur in low-temperature environments; this is a normal physical change. Place the container in a warm environment (recommended not exceeding 40°C) to slowly return to temperature and stir evenly before use. Although the flash point is relatively high (>150°C), it is still a flammable liquid; smoking and open flames are strictly prohibited in the storage area. The product has long-lasting harmful effects on aquatic organisms (H412). In case of leakage, do not discharge into sewers or water bodies; absorb with inert materials such as sand, vermiculite, etc., collect in sealed containers, and dispose of through qualified waste treatment agencies. The above shelf life information is an industry general reference value and not a contractual basis for product quality guarantee period. The specific quality guarantee period shall be based on the batch test report or the warranty period issued by the manucturer.

Question 7

What safety precautions should be taken when using Polyether L-62?

Accepted Answer

Polyether L-62 is a low-toxicity nonionic surctant, but special attention should still be paid to skin/eye irritation, respiratory protection, and environmental emission control. Protective equipment should be worn and operation should be carried out in a well-ventilated area. Detailed Description Polyether L-62 (Poloxamer 182) is a non-ionic polyoxyethylene polyoxypropylene block copolymer produced by Hainan County Guoli Chemical Co., Ltd. According to GHS classification, this product lls under skin irritation (Category 2), serious eye damage/eye irritation (Category 2A), specific target organ toxicity - single exposure (Category 3, respiratory irritation), and chronic aquatic toxicity (Category 3), requiring corresponding engineering controls and personal protective measures throughout the entire use process. The product has low acute oral toxicity (LD₅₀ (rat) > 2000 mg/kg), with no mutagenicity, carcinogenicity, or reproductive toxicity observed. However, with a flash point above 150°C (closed cup), it can still burn when exposed to open flames and high heat, so storage and use must be kept away from ignition sources and heat. Combustion may produce harmful gases such as carbon monoxide and carbon dioxide. In terms of ecological safety, Polyether L-62 is harmful to aquatic life with long-lasting effects (H412). Therefore, untreated wastewater must not be directly discharged into natural water bodies, and waste disposal must comply with local environmental regulations. Hazard Classification Hazard CategoryGHS ClassificationHazard Code Skin IrritationCategory 2H315 Serious Eye Damage/Eye IrritationCategory 2AH319 Specific Target Organ Toxicity (Single Exposure, Respiratory Irritation)Category 3H335 Chronic Aquatic ToxicityCategory 3H412 Toxicological and Physicochemical Safety Parameters ParameterValue Acute Oral Toxicity LD₅₀ (Rat)> 2000 mg/kg MutagenicityNot observed CarcinogenicityNot observed Reproductive ToxicityNot observed Flash Point (Closed Cup)> 150°C ExplosivityNone Hazardous Combustion ProductsCarbon monoxide, carbon dioxide Safe Operation Precautions Engineering Controls and Ventilation: The work area should be equipped with local exhaust ventilation or general ventilation systems. Use only outdoors or in a well-ventilated area (P271). Avoid large-scale operations in enclosed spaces. If mist/vapor/spray is generated, enhance ventilation. Personal Protective Equipment (PPE): Hand Protection: Wear chemical-resistant protective gloves (e.g., nitrile rubber gloves) Eye Protection: Wear protective goggles or chemical safety glasses Respiratory Protection: Wear appropriate protective masks when ventilation is insufficient or when aerosols may be generated Skin Protection: Wear appropriate protective clothing to avoid direct skin contact Work Habits: Avoid inhaling mist/vapor/spray during operation (P261). Thoroughly wash hands and exposed skin after operation (P264). Do not eat, drink, or smoke in the work area. First Aid Measures Exposure RouteFirst Aid Method Skin ContactRemove contaminated clothing and rinse thoroughly with plenty of running water. If irritation persists, seek medical attention (P302+P352, P332+P313) Eye ContactImmediately lift eyelids and rinse carefully with running water or saline solution for several minutes. If wearing contact lenses, remove them and continue rinsing. If eye irritation persists, seek medical attention (P305+P351+P338, P337+P313) InhalationQuickly move the person to fresh air, maintain a clear airway, and keep in a comfortable breathing position. If breathing is difficult, give oxygen; if breathing stops, immediately perform artificial respiration and seek medical attention (P304+P340) IngestionDrink plenty of warm water, induce vomiting, and seek medical attention immediately (P312) Storage and Fire Safety Precautions Storage Conditions: Store in a cool, dry, well-ventilated warehouse, away from ignition sources and heat Avoid direct sunlight, keep containers sealed to prevent moisture Keep away from oxidizers, acids, etc., and avoid mixed storage The storage area should be equipped with spill emergency response equipment and suitable containment materials Firefighting Measures: Firefighters must wear self-contained breathing apparatus and full fireproof and chemical protective clothing, and fight fire from upwind. If possible, move containers from the fire area to an open space, spray water to cool containers until fire is out. Suitable extinguishing agents include water spray, foam, dry powder, carbon dioxide, and sand. Spill Emergency Response: Small spill: Absorb with sand, vermiculite, or other inert materials, and collect in sealed containers Large spill: Build dikes or dig pits for containment, transfer using pumps to tank trucks or special collectors, recycle or transport to waste treatment sites for disposal Environmental Tips Polyether L-62 is harmful to aquatic life with long-lasting effects. Wastewater after use must be treated to meet standards before discharge and must not be directly discharged into natural water bodies. Waste products and packaging should be handled by qualified units in accordance with local hazardous waste management regulations. The above safety information is compiled based on the product data of Polyether L-62 provided by Hainan County Guoli Chemical Co., Ltd. Please refer to the Safety Data Sheet (SDS) before use.

Question 8

How to use polyether L-62? What is the recommended dosage?

Accepted Answer

Polyether L-62 is a low-foaming nonionic surctant. It is usually added directly to the aqueous phase and stirred evenly. The recommended dosage varies greatly depending on the application, generally between 0.05% and 5%. Detailed Description Polyether L-62 (Poloxamer 182) is a polyoxyethylene-polyoxypropylene block copolymer. It appears as a colorless to light yellow transparent liquid with an active content of ≥99%. Due to its excellent water solubility and low-foaming properties, it is relatively simple to use—in most water-based formulations, it can be directly added to water and stirred to dissolve, requiring no special equipment or processes. For systems that need to be combined with oil-phase components (such as emulsion systems), it is usually first dissolved uniformly in the aqueous phase and then mixed with the oil phase for emulsification. The HLB value of Polyether L-62 is approximately 7, making it an amphiphilic surctant. Its cloud point is low (about 32°C for a 1% aqueous solution), which is the key basis for its low-foaming performance. When the system temperature exceeds the cloud point, the solubility of Polyether L-62 in water decreases, surce activity reduces, and foam formation is correspondingly suppressed. Therefore, its foam-suppressing advantage is particularly prominent in processes requiring high-temperature operations (such as spray cleaning, high-temperature dyeing). Since Polyether L-62 is hygroscopic, it should be sealed and stored immediately after opening. If the product becomes turbid or separates due to low-temperature storage before use, it can be restored to a transparent state by heating to room temperature and stirring evenly, without affecting its performance. For compounding systems with other surctants, it is recommended to determine the optimal ratio through orthogonal experiments or compatibility tests to fully leverage its synergistic and foam-suppressing functions. Technical Parameters Parameter NameValue Ionic TypeNonionic AppearanceColorless to light yellow transparent liquid HLB Value7 Active Content≥99% Cloud Point (1% aqueous solution)Approx. 32°C Hydroxyl Value40~50 mgKOH/g Density (25°C)1.03~1.05 g/cm³ Kinematic Viscosity (25°C)Approx. 400 mm²/s pH (1% aqueous solution)5.0~7.5 Surce Tension (0.1%, 25°C)Approx. 40 mN/m CMC (25°C)Approx. 1.1×10⁻⁴ mol/L Moisture≤0.5% Flash Point (Closed Cup)>150°C Pour PointApprox. -20°C Application Recommendations According to the Guoli Chemical product database and common industry practices, the recommended addition levels of Polyether L-62 in different application fields are as follows: Application FieldRecommended Addition (Weight Percentage)Description Metalworking Fluids (Cutting Fluids, Grinding Fluids)0.5%~3%Added as a low-foaming lubricating and cooling component, can be used together with other lubricants and rust inhibitors Industrial Low-Foaming Cleaners1%~5%Used as the main or auxiliary agent for wetting, penetrating, and detergency, especially suitable for spray and high-pressure cleaning systems Defoamer/Antifoam Component0.05%~0.5%Used directly as a core antifoam raw material, or compounded with hydrophobic silica, etc., to enhance foam-breaking effect Textile Scouring Agent/Leveling Agent0.2%~2%Added directly to scouring and dyeing baths to improve bric wetting and leveling Cosmetic Creams/Lotions0.5%~3%Compounded with the primary emulsifier as an auxiliary emulsifier to provide a soft skin feel Pesticide Soluble Concentrates (SL)1%~5%Added directly to the formulation to enhance emulsification, dispersion, wetting, and spreading, avoiding excessive foam during spraying Water-Based Coatings/Ink Dispersants0.1%~1%Added during the grinding or letdown stage to promote stable pigment dispersion and reduce foam in the system Pharmaceutical Solubilization/Suppository Bases0.1%~5%The dosage should be determined experimentally based on the drug properties and target release profile Compounding Recommendations: Polyether L-62 can be compounded with anionic, cationic, and other nonionic surctants, showing good compatibility. To enhance emulsifying ability, it can be combined with higher HLB surctants (such as Polyether L-64, isomeric alcohol ethers, etc.); to strengthen defoaming effect, it can be compounded with silicone defoamers or mineral oil defoamers, where Polyether L-62 acts as a "bridge" and synergist. Precautions Protective Requirements: Wear protective gloves, safety goggles, and a ce shield during operation to avoid direct skin and eye contact. Use in a well-ventilated area and avoid inhaling vapors or spray. Temperature Control: When the operating temperature exceeds the cloud point (approx. 32°C), the product may precipitate from the aqueous solution; this is normal and can be restored by cooling or stirring. This characteristic can be utilized to achieve low foaming in high-temperature systems. Dissolution Method: It can be directly stirred into water at room temperature to dissolve. To accelerate dissolution, pre-dilute with warm water (not exceeding 50°C), but avoid prolonged high-temperature heating. Storage Conditions: Store in a cool, dry, well-ventilated place, away from fire and heat sources. Keep the container sealed to prevent moisture. Store separately from oxidizers and acids. The product is hygroscopic; use as soon as possible after opening. Dosage Optimization: The above addition amounts are industry-recommended ranges. The actual optimal dosage should be determined through formulation experiments to achieve the best balance of target performance and economy. Environmental Disposal: This product has long-term chronic toxicity to aquatic organisms (H412). Waste liquid after use should be properly disposed of and not discharged directly into water bodies.

Question 9

What are the main industries and processes where Polyether L-62 is applied?

Accepted Answer

Polyether L-62 is widely used in eight major industries including metalworking, industrial cleaning, textile dyeing and printing, defoamers, cosmetics, pesticides, coatings, and pharmaceuticals. It is a multifunctional nonionic surctant. Detailed Description Polyether L-62 (Poloxamer 182/Poloxamer 182) is a nonionic surctant formed by block copolymerization of ethylene oxide (EO) and propylene oxide (PO). At room temperature, it is a colorless to light yellow transparent liquid. Its unique EO-PO-EO block structure endows it with excellent emulsifying, wetting, dispersing, and leveling capabilities, along with low-foaming or even foam-suppressing properties, as well as resistance to acids, alkalis, and hard water, making it irreplaceable in multiple industrial fields. In metalworking fluids (such as cutting fluids and grinding fluids), Polyether L-62 serves as a low-foam lubricating and cooling component, effectively suppressing foam generated by high-pressure spraying and circulating agitation during processing, while improving workpiece surce finish. In the field of industrial and commercial low-foam cleaners, it provides excellent wetting, penetration, and detergency, maintaining extremely low foam even under spray and high-pressure cleaning conditions, suitable for precision parts cleaning, vehicle cleaning, and similar scenarios. Additionally, due to its outstanding defoaming and foam-suppressing properties, it is often used as a core raw material or synergistic component in water-based defoamers. In light industry and fine chemicals, Polyether L-62 also has broad applications: in textile pretreatment and dyeing/printing, it acts as a low-foam scouring agent and leveling agent component, improving bric wetting and permeability, cilitating uniform dyeing; in cosmetics and personal care products, it provides mild emulsifying and dispersing effects, suitable for creams, lotions, and other formulations, offering a smooth skin feel; in pesticide soluble concentrates, it enhances emulsification, dispersion, wetting, and spreading of the formulation in water, improving efficacy while avoiding excessive foam that may affect application; in water-based coatings and inks, it promotes stable dispersion of pigments and fillers, reduces system foam, and improves coating leveling; in the pharmaceutical field, it can be used as a solubilizer for poorly soluble drugs and as a suppository base excipient, to modulate drug dissolution and release characteristics. Application Industries and Processes Summary Application Industry Specific Process/Use Core Function Metalworking Cutting fluids, grinding fluids, rolling fluids Low-foam lubrication, cooling, foam suppression Industrial Cleaning Spray cleaning, high-pressure cleaning, ultrasonic cleaning Wetting, penetration, detergency, low foam Defoamer Manucturing Core raw material for water-based defoamers, foam suppression synergistic component Defoaming, foam suppression Textile Dyeing and Printing Scouring, bleaching, leveling, finishing Wetting, penetration, leveling, low foam Cosmetics Emulsification in creams, lotions, cial cleansers Emulsifying, dispersing, smooth skin feel Pesticide Formulations Adjuvants for soluble concentrates (SL), emulsifiable concentrates (EC) Emulsification dispersion, wetting, spreading Coatings and Inks Dispersion in water-based coatings, water-based inks Pigment dispersion, foam suppression, leveling Pharmaceuticals Solubilizer, suppository base excipient Solubilization, release modulation Application Recommendations Polyether L-62 has a moderate HLB value, providing good hydrophilic-lipophilic balance. It is recommended for use as a multifunctional additive in formulations. In low-foam cleaning and metalworking fluid formulations, the recommended dosage is generally 2% to 8% of the total formulation, with specific amounts adjusted based on foam control requirements and cleaning intensity. In defoamer formulations, it can be used as the main active component in synergy with other hydrophobic particles to achieve defoaming and long-lasting foam suppression effects. When used in cosmetics and pharmaceuticals, attention should be paid to the poloxamer grade and purity requirements to ensure compliance with relevant pharmacopoeia or cosmetic raw material standards. Precautions This product is a combustible liquid (flash point > 150°C). Keep away from open flames and high-temperature heat sources during storage and use. It is recommended to wear protective gloves and goggles during handling to avoid skin and eye contact (GHS classification: Skin irritation H315, Serious eye irritation H319). Ensure adequate ventilation during use to avoid inhaling vapors or mists (may cause respiratory irritation H335). Harmful to aquatic life with long-lasting effects (H412). Do not discharge waste liquid into water bodies arbitrarily; dispose of it properly in accordance with local regulations. Store in a cool, dry, well-ventilated warehouse, keep containers sealed, avoid direct sunlight, and keep away from oxidizers and acids.

Question 10

What are the physicochemical technical parameters of Polyether L-62?

Accepted Answer

Physicochemical technical parameters of Polyether L-62 (Poloxamer 182) cover multiple dimensions such as appearance, surce activity, physical constants, chemical indicators, and safety data. The following is a detailed technical parameter table for products from Hai'an Guoli Chemical Co., Ltd. Detailed Description Polyether L-62 (CAS number: 9003-11-6), chemical full name polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer, belongs to nonionic surctants, also known commercially as Poloxamer 182. It appears as a colorless to light yellow transparent liquid with a molecular weight of about 2500, featuring outstanding properties of low foaming, acid and alkali resistance, and hard water resistance. This product has an HLB value of about 7, a cloud point of approximately 32°C (1% aqueous solution), and is soluble in common solvents such as water, ethanol, and ether. In terms of surce activity performance, the critical micelle concentration (CMC) of Polyether L-62 is about 1.1×10⁻⁴ mol/L (25°C), with a surce tension of about 40 mN/m (0.1% aqueous solution, 25°C), demonstrating good wetting and penetrating power as well as emulsification and dispersion capabilities. Regarding physical constants, its density is 1.03~1.05, refractive index about 1.452 (25°C), kinematic viscosity about 400 mm²/s (25°C), pour point about -20°C, and flash point greater than 150°C. For chemical indicators, the active content of Polyether L-62 is ≥99%, moisture ≤0.5%, acid value ≤0.1 mgKOH/g, saponification value ≤2 mgKOH/g, hydroxyl value between 40-50 mgKOH/g, iodine value ≤1, heavy metal content ≤20 mg/kg, and arsenic content ≤2 mg/kg. The product is chemically stable under normal storage conditions but is hygroscopic and requires sealed storage. Technical Parameters Parameter Item Technical Indicator Product Name Polyether L-62 (Poloxamer 182) CAS Number 9003-11-6 Ion Type Nonionic Appearance Colorless to light yellow transparent liquid Molecular Formula HO(C₂H₄O)a(C₃H₆O)b(C₂H₄O)aH (block copolymer) Molecular Weight About 2500 Active Content ≥99% Moisture ≤0.5% HLB Value 7 Cloud Point (1% Aqueous Solution) About 32°C pH Value (1% Aqueous Solution) 5.0 - 7.5 pH Value (5% Aqueous Solution) 5.0 - 7.0 Density (25°C) 1.03 - 1.05 g/cm³ Refractive Index (25°C) About 1.452 Kinematic Viscosity (25°C) About 400 mm²/s Pour Point About -20°C Flash Point (Closed Cup) >150°C Surce Tension (0.1% Aqueous Solution, 25°C) About 40 mN/m Critical Micelle Concentration (CMC, 25°C) About 1.1×10⁻⁴ mol/L Acid Value ≤0.1 mgKOH/g Saponification Value ≤2 mgKOH/g Hydroxyl Value 40 - 50 mgKOH/g Iodine Value ≤1 Heavy Metal Content ≤20 mg/kg Arsenic Content ≤2 mg/kg Free Alcohol ≤0.5% Solubility Soluble in water, ethanol, ether, and other organic solvents Foam Performance Low foam

Polyether L-62

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Property	Value
CAS No.	9003-11-6
Molecular Formula	HO(C2H4O)a(C3H6O)b(C2H4O)aH (block copolymer)
Appearance	Colorless to light yellow transparent liquid
Ionic Type	Nonionic
Avg. Molecular Weight	~2500
Cloud Point	~32°C (1%aq. soln.)
Active Content	≥99%
pH Value(1%)	5.0-7.5
pH Value(5%)	5.0-7.0
Iodine Value	≤1
Solubility	Soluble in water, ethanol, ethyl ether and other organic solvents
Surface Tension	~40 mN/m (0.1%aq. soln., 25°C)
CMC	~1.1×10⁻⁴ mol/L (25°C)
Acid Value	≤0.1
Saponification Value	≤2
Hydroxyl Value	40-50
Moisture	≤0.5
Density	1.03~1.05
Kinematic Viscosity	~400 mm²/s (25°C)
Refractive Index	~1.452 (25°C)
Flash Point	>150°C
Hygroscopicity	Hygroscopic
Chemical Stability	Stable under normal storage conditions
Penetration	Good
Foam Property	Low foam
Alkali Resistance	Good
Unsaturation	Extremely low
Viscosity	~400 mPa·s (25°C)
Melting Point	Liquid; pour point ~-20°C
Low Shear Viscosity	~400 mPa·s
Solid Content	≥99%
Free Alcohol	≤0.5%
Heavy Metal	≤20 mg/kg
Arsenic	≤2 mg/kg

Polyether L-62

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Application Guidelines

Packaging and Storage

Polyether/Poloxamer Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

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