L-62 Poloxamer (Poloxamer 182, CAS No.: 9003-11-6) is synthesized by block copolymerization of ethylene oxide (EO) and propylene oxide (PO) in a precise ratio, with an average molecular weight of approximately 2500 and a general molecular formula of HO(C₂H₄O)a(C₃H₆O)b(C₂H₄O)aH. Its unique EO-PO-EO three-block structure endows the product with excellent low-foaming wetting and dispersing properties. With an HLB value of about 7, it is amphiphilic, dispersible in water, and readily soluble in organic solvents.
This product exhibits excellent chemical stability, maintaining stable performance under acidic, alkaline, and hard water conditions. Its cloud point is approximately 32°C (1% aqueous solution), making it outstanding in cleaning applications requiring temperature control, such as rinse aids for automatic dishwashers. Toxicological data show that its acute oral toxicity LD₅₀ (rat) is greater than 5000 mg/kg, indicating it is practically non-toxic, environmentally friendly, and readily biodegradable.
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product Name | L-62 Poloxamer (Poloxamer 182) | Appearance | Colorless to light yellow transparent liquid |
| CAS No. | 9003-11-6 | Ionic Type | Nonionic |
| Average Molecular Weight | Approximately 2500 | Active Content | ≥99% |
| HLB Value | 7 | Density (25°C) | Approximately 1.03 g/cm³ |
| Cloud Point (1% Aqueous Solution) | Approximately 32°C | Kinematic Viscosity (25°C) | Approximately 400 mm²/s |
| pH Value (1% Aqueous Solution) | 5.0-7.5 | Dynamic Viscosity (25°C) | Approximately 400 mPa·s |
| pH Value (5% Aqueous Solution) | 5.0-7.5 | Refractive Index (20°C) | 1.452-1.456 |
| Acid Value | ≤0.5 mg KOH/g | Flash Point (COC) | Approximately 240°C |
| Saponification Value | ≤1 mg KOH/g | Pour Point | Approximately -20°C |
| Hydroxyl Value | 40-55 mg KOH/g | Surface Tension (0.1%, 25°C) | Approximately 40 mN/m |
| Iodine Value | ≤1 | Critical Micelle Concentration (25°C) | Approximately 0.1% |
| Moisture Content | ≤0.5% | Unsaturation | ≤0.02 mol/kg |
| Free Alcohol | ≤1.0% | Foam Characteristics | Low foaming |
| Heavy Metals | ≤20 mg/kg | Arsenic | ≤2 mg/kg |
| Solubility | Readily soluble in organic solvents such as ethanol and ether, dispersible in water | Penetration Power | Good |
| Hygroscopicity | Hygroscopic | Chemical Stability | Stable under normal conditions, resistant to acids and alkalis, avoid strong oxidizers |
(Data source: Guoli Chemical Product Database)
Based on the above physicochemical parameters, L-62 Poloxamer is highly suitable for the following applications: With an HLB value of 7, it is ideal for preparing water-in-oil (W/O) emulsions and can also serve as an auxiliary emulsifier in oil-in-water (O/W) systems; its low-foaming characteristic (surface tension approximately 40 mN/m) makes it excellent in rinse aids for automatic dishwashers, industrial cleaners, and metalworking fluids, quickly wetting surfaces without excessive foam; the cloud point of approximately 32°C results in reduced surface activity when water temperature slightly exceeds this point, allowing controlled foaming and rapid rinsing; good dispersibility and penetration power are suitable for pigment and filler dispersion, as well as agricultural chemical spreader formulations.