PEG-40 Stearate SG-40, full name polyoxyethylene (40) stearate, CAS number 9004-99-3, also known as PEG-40 stearate or emulsifier SG-40. It is produced by Hai'an Guoli Chemical Co., Ltd. and is a nonionic surfactant that appears as a white to pale yellow waxy solid at room temperature. Its molecular weight is about 2045, with excellent hydrophilicity and chemical stability, and is readily soluble in water and various organic solvents.
The core feature of this product lies in its excellent O/W (oil-in-water) emulsifying ability, capable of forming stable fine emulsions over a wide range of temperatures and pH. Additionally, it has outstanding electrolyte tolerance, maintaining activity in acid, alkali, and high-concentration salt solutions. It also compatibly blends with anionic, cationic, and zwitterionic surfactants to exert synergistic effects, making it a key component in many industrial formulations.
In terms of safety and environmental protection, SG-40 performs excellently. It is not classified as a hazardous substance, has very low acute oral toxicity (LD50 > 5000 mg/kg), is non-irritating to skin and eyes, and is readily biodegradable, aligning with the principles of green chemistry and sustainable development.
The following are the main technical indicators of PEG-40 Stearate SG-40 provided by Hai'an Guoli Chemical Co., Ltd.:
| Parameter | Specification/Value |
|---|---|
| Appearance | White to pale yellow waxy solid |
| Ionic type | Nonionic |
| HLB value | 16-17 |
| Active content | ≥99% |
| pH of 1% aqueous solution | 5.0-7.0 |
| Melting point | 48-52°C |
| Cloud point (1% aqueous solution) | >100°C |
| Acid value | ≤2 mgKOH/g |
| Saponification value | 25-35 mgKOH/g |
| Hydroxyl value | approx. 28 mgKOH/g |
| Flash point | >150°C |
| Surface tension (1%, 25°C) | approx. 42 mN/m |
| Moisture | ≤1.0% |
| Heavy metal content | ≤10 ppm |
Note: The above data are all sourced from the Guoli Chemical product database.
With its excellent performance, SG-40 is widely used in various industrial fields, and the recommended dosage should be adjusted according to specific formulations: