Polyether L-45 (CAS number: 9003-11-6) has the chemical full name polyoxyethylene-polyoxypropylene block copolymer, belonging to the Poloxamer class of nonionic surfactants, also known commercially as Pluronic L-45. From the molecular structure perspective, its molecular formula is HO(C₂H₄O)x(C₃H₆O)y(C₂H₄O)xH, which is a triblock copolymer composed of hydrophilic polyoxyethylene (EO) segments and hydrophobic polyoxypropylene (PO) segments. The molecular weight range is between 2000 and 3000, and the product appears as a colorless to slightly yellow transparent liquid.
The EO/PO ratio in the molecule is optimized, endowing it with unique amphiphilic properties: it has good solubility in aqueous solutions and effectively reduces interfacial tension. As a nonionic surfactant, its performance is not affected by calcium and magnesium ions in water, exhibiting strong hard water resistance and maintaining chemical stability over a wide pH range. The product is a low-foaming surfactant, suitable for industrial scenarios requiring rapid rinsing and foam control.
| Parameter Item | Specification Data |
|---|---|
| Chemical Full Name | Polyoxyethylene-polyoxypropylene block copolymer |
| CAS Number | 9003-11-6 |
| Aliases | Polyether Polyol L-45, Poloxamer, Pluronic L-45 |
| Molecular Formula | HO(C₂H₄O)x(C₃H₆O)y(C₂H₄O)xH |
| Molecular Weight | 2000~3000 |
| Effective Content | ≥99% |
| Ion Type | Nonionic |
| HLB Value | 11~13 |
| Cloud Point (1% Aqueous Solution) | 65~75°C |
| Hydroxyl Value | 50~60 |
| Density (25°C) | 1.02~1.06 g/cm³ |
| Kinematic Viscosity (25°C) | 500~1000 mm²/s |
| Surface Tension (0.1%, 25°C) | 30~35 mN/m |
| pH Value (1% Aqueous Solution) | 5.0~7.5 |
| Appearance | Colorless to slightly yellow transparent liquid |
| Flash Point | >200°C |
The above parameters are sourced from the Guoli Chemical product database.
Based on its EO-PO block copolymer structural characteristics, Polyether L-45 excels in the following areas: as a low-foaming wetting agent in industrial cleaners, rapidly penetrating and emulsifying heavy grease stains; used in rinse aid formulations for dishwashing, achieving fast drying and streak-free results by reducing the surface tension of rinse water; as a lubricating and foam-suppressing component in metalworking fluids, ensuring stability under high-pressure spraying and high-speed cutting; as a penetrating dispersant in textile scouring and bleaching processes; and as a basic carrier for pesticide emulsifiers and industrial defoamers.
According to GHS classification, this product has the following hazardous characteristics: causes skin irritation (H315), causes serious eye irritation (H319), may cause respiratory irritation (H335). When handling, wear approved chemical safety goggles (conforming to EN 166 standard) and nitrile or butyl rubber protective gloves, use in well-ventilated areas, and avoid inhaling vapors or mists. If contact with eyes or skin occurs, rinse immediately with plenty of water for at least 15 minutes; if irritation persists, seek medical attention. For details, refer to the product safety data sheet.