Polyether L-62 (CAS number: 9003-11-6), chemical full name polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer, belongs to nonionic surfactants, 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 surface activity performance, the critical micelle concentration (CMC) of Polyether L-62 is about 1.1×10⁻⁴ mol/L (25°C), with a surface 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.
| 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 |
| Surface 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 |