What are the physicochemical and technical parameters of Polyether L-45?

Polyether L-45 is a poloxamer-type nonionic surfactant produced by Guoli Chemical. Its physicochemical parameters include HLB value 11~13, cloud point 65~75°C, active content ≥99%, and other indicators, offering balanced overall performance and suitability for a variety of industrial formulation systems.<\/h2>\n\n

Detailed Description<\/h3>\n

Polyether L-45 (CAS No.: 9003-11-6), the full chemical name is polyoxyethylene-polyoxypropylene block copolymer<\/strong>, belonging to the poloxamer class of nonionic surfactants. Its molecular structure is HO(C₂H₄O)ₓ(C₃H₆O)ᵧ(C₂H₄O)ₓH, with a molecular weight range of 2000~3000. The product appears as a colorless to slightly yellow transparent liquid, with excellent emulsifying, wetting, and dispersing properties. It is also known for low foaming characteristics<\/strong> and is widely used in industrial cleaning and metalworking fields.<\/p>\n

In terms of surface activity, the HLB value of Polyether L-45 is in the intermediate to slightly hydrophilic range of 11~13, with a cloud point of 65~75°C (1% aqueous solution), indicating good temperature stability in aqueous solutions. The surface tension at 0.1% concentration is 30~35 mN\/m, and the critical micelle concentration (CMC) is approximately on the order of 1×10⁻⁴ mol\/L, showing that the product can significantly reduce water surface tension at low concentrations, with high wetting and spreading efficiency. Meanwhile, the product is stable to dilute alkalis and has strong resistance to hard water, making it suitable for a wide range of pH conditions.<\/p>\n

From the perspective of purity and physical properties, the product has an active content ≥99%, solid content ≥99%, moisture ≤0.5%, free alcohol ≤1%, indicating high overall purity. Acid value ≤0.5 mgKOH\/g, saponification value ≤1, iodine value ≤1, unsaturation ≤0.5 mmol\/g, indicating stable chemical properties with almost no saponifiable impurities or unsaturated components. Heavy metal content ≤10 mg\/kg, arsenic content ≤2 mg\/kg, meeting safety standards for fine chemicals. Kinematic viscosity is 500~1000 mm²\/s (25°C), density 1.02~1.06 g\/cm³, refractive index 1.450~1.460 (25°C), flash point >200°C, melting point < -20°C, and it is a well-flowing liquid at room temperature.<\/p>\n\n

Technical Parameters<\/h3>\n\n \n \n \n \n \n \n \n \n

Parameter Item<\/th>\n	Specification\/Value<\/th>\n	Remarks<\/th>\n <\/tr>\n
Product Name<\/strong><\/td>\n	Polyether L-45<\/td>\n	Poloxamer type<\/td>\n <\/tr>\n
Full Chemical Name<\/strong><\/td>\n	Polyoxyethylene-polyoxypropylene block copolymer<\/td>\n	—<\/td>\n <\/tr>\n
CAS No.<\/strong><\/td>\n	9003-11-6<\/td>\n	—<\/td>\n <\/tr>\n
Molecular Formula<\/strong><\/td>\n	HO(C₂H₄O)ₓ(C₃H₆O)ᵧ(C₂H₄O)ₓH<\/td>\n	Block copolymer structure<\/td>\n <\/tr>\n
Molecular Weight<\/strong><\/td>\n	2000～3000<\/td>\n	—<\/td>\n <\/tr>\n
Ionic Type<\/strong><\/td>\n	Nonionic<\/td>\n	—<\/td>\n <\/tr>\n
Appearance<\/strong><\/td>\n	Colorless to slightly yellow transparent liquid<\/td>\n	Visual inspection<\/td>\n <\/tr>\n<\/table>\n \n\n \n \n \n \n \n \n \n \n Parameter Item<\/th>\n Specification\/Value<\/th>\n Remarks<\/th>\n <\/tr>\n HLB Value<\/strong><\/td>\n 11～13<\/td>\n Hydrophilic-lipophilic balance value<\/td>\n <\/tr>\n Cloud Point<\/strong><\/td>\n 65～75 °C<\/td>\n 1% aqueous solution<\/td>\n <\/tr>\n Surface Tension<\/strong><\/td>\n 30～35 mN\/m<\/td>\n 0.1% aqueous solution, 25°C<\/td>\n <\/tr>\n Critical Micelle Concentration (CMC)<\/strong><\/td>\n Approximately 1×10⁻⁴ mol\/L<\/td>\n Order of magnitude<\/td>\n <\/tr>\n Foaming Property<\/strong><\/td>\n Low foaming<\/td>\n —<\/td>\n <\/tr>\n Solubility<\/strong><\/td>\n Soluble in water, ethanol, ether, etc.<\/td>\n —<\/td>\n <\/tr>\n Alkali Resistance<\/strong><\/td>\n Stable to dilute alkalis<\/td>\n —<\/td>\n <\/tr>\n<\/table>\n \n\n \n Back to FAQ