Polypropylene glycol PPG-600 (CAS No.: 25322-69-4) is a nonionic propylene oxide polymer produced by Haian Guoli Chemical Co., Ltd., with the molecular formula HO(C3H6O)nH (n≈10), a molecular weight between 570~630, and an appearance of a colorless to light yellow transparent viscous liquid. This product exhibits excellent chemical stability, maintaining stability under normal temperature and pressure, and has good compatibility with anionic, cationic, and amphoteric surfactants, offering high formulation flexibility.
As a nonionic surfactant with a low HLB value (approximately 1.5), PPG-600 features low foaming properties, is soluble in water, and readily soluble in organic solvents such as alcohols, esters, and ketones, with a surface tension of about 33 mN/m. The product has a high flash point (≥230°C), a melting point below -20°C, maintains stable performance under a wide pH range and hard water conditions, exhibits excellent resistance to acids, alkalis, and hard water, and possesses good hygroscopicity as well as lubricating and moisturizing properties.
The following technical parameter data are sourced from Guoli Chemical's product database, covering comprehensive information from physical properties and chemical indicators to packaging specifications, providing accurate reference for product selection, formulation design, and quality testing.
| Parameter Item | Technical Indicator |
|---|---|
| Product Name | Polypropylene Glycol PPG-600 |
| CAS Number | 25322-69-4 |
| Molecular Formula | HO(C₃H₆O)nH, n≈10 |
| Molecular Weight | 570~630 |
| Appearance | Colorless to light yellow transparent viscous liquid |
| Ionic Type | Nonionic |
| Active Content | ≥99% |
| Moisture Content | ≤0.1% |
| Density (25°C) | 1.004~1.010 g/cm³ |
| Kinematic Viscosity (40°C) | 100~130 mPa·s |
| Low Shear Viscosity (25°C) | 150~200 mPa·s |
| Refractive Index (25°C) | 1.449~1.452 |
| Melting Point | < -20°C |
| Flash Point (Closed Cup) | ≥230°C |
| Cloud Point | 30~40°C |
| HLB Value | Approx. 1.5 |
| Hydroxyl Value | 178~197 mgKOH/g |
| Acid Value | ≤0.1 mgKOH/g |
| Saponification Value | ≤1 mgKOH/g |
| Amine Value | ≤0.1 mgKOH/g |
| Iodine Value | ≤1 gI₂/100g |
| Unsaturation | ≤0.01 mmol/g |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| pH Value (5% Aqueous Solution) | 5.0~8.0 |
| Surface Tension | Approx. 33 mN/m |
| Foaming Characteristic | Low foaming |
| Hygroscopicity | Hygroscopic |
| Solubility | Soluble in water, readily soluble in organic solvents such as alcohols, esters, and ketones |
| Alkali Resistance | Stable |
| Chemical Stability | Stable under normal temperature and pressure, avoid strong oxidizers |
| Heavy Metal Content | ≤10 ppm |
| Arsenic Content | ≤2 ppm |
| Packaging Specifications | 50kg plastic drum / 200kg plastic drum / IBC tote |
Based on the above technical parameters, the core application directions of polypropylene glycol PPG-600 can be summarized as follows: The hydroxyl value of 178~197 mgKOH/g makes it highly suitable as a polyether polyol component for polyurethane prepolymers and elastomer synthesis, reacting with isocyanates to impart excellent flexibility and resilience to the final products. The viscosity of 100~130 mPa·s and low foaming characteristic make it an ideal base component for industrial defoamers (fermentation, papermaking, coatings). In the fields of synthetic lubricants and metalworking fluids, its high flash point (≥230°C) and excellent lubricity ensure operational safety under high-temperature conditions. In daily chemicals and pharmaceuticals, its low toxicity (LD₅₀ > 2,000 mg/kg) and good skin-friendly moisturizing properties make it suitable for cosmetic solvents and pharmaceutical ointment bases.