Emulsifier SG-100 is a nonionic surfactant produced by esterification of stearic acid with polyethylene glycol (average polymerization degree of about 100). Its CAS number is 9004-99-3, molecular weight approximately 4670. The molecular structure contains a hydrophilic polyoxyethylene long chain (—(CH₂CH₂O)nH, n≈100) and a lipophilic stearic acid acyl group (C₁₇H₃₅CO—), endowing the product with extremely high hydrophilicity. The HLB value is as high as 18.5-19, cloud point exceeds 100°C, and it has excellent solubility and dispersion stability in water.
The product has a monoester content ≥90%, active substance content ≥99%, good chemical stability in the pH range of 3-8, and is resistant to acids, alkalis and hard water. Its low foaming property and nonionic nature make it highly compatible when formulated with other ionic or nonionic auxiliaries, and it will not precipitate or become deactivated due to calcium or magnesium ions in water. In addition, emulsifier SG-100 has very low toxicity (rat acute oral LD₅₀ > 5000 mg/kg), skin irritation index < 0.5, and excellent biodegradability (> 60% degradation in 28 days), meeting the requirements of green chemistry and sustainable development.
Emulsifier SG-100 is professionally produced by Haian Guoli Chemical Co., Ltd. (Guoli Chemical), packaged in 20 kg woven bags, with recommended storage temperature of 5°C to 40°C. The product melts into a flowable liquid at 50-55°C, and it can be melted by heating before use for convenient dosing.
| Item | Specification |
|---|---|
| Chemical Name | Polyoxyethylene (100) Stearate (PEG-100 Stearate) |
| CAS No. | 9004-99-3 |
| Ionic Type | Nonionic |
| Appearance | White to light yellow waxy solid |
| Molecular Weight | Approx. 4670 |
| HLB Value | 18.5-19 |
| Cloud Point | >100°C |
| Melting Point | 50-55°C |
| Active Content | ≥99% |
| Monoester Content | ≥90% |
| pH (1% Aqueous Solution) | 5.0-7.0 |
| Acid Value | ≤2 mg KOH/g |
| Saponification Value | 12-16 mg KOH/g |
| Iodine Value | <2 g I₂/100g |
| Moisture | ≤1% |
| Density | ≤1.0 g/cm³ |
| Flash Point | >200°C |
| Surface Tension (1% aqueous solution, 25°C) | Approx. 40 mN/m |
| Solubility | Easily soluble in water, ethanol, acetone and other organic solvents |
| Foam Characteristic | Low foaming |
Cosmetics and Personal Care: Used as O/W emulsifier and solubilizer for creams, lotions, sunscreens and other products, recommended dosage is usually 1%-5%. Its high HLB value can effectively construct a stable and fine oil-in-water emulsion system, while improving the dispersion uniformity and application feel of active ingredients, giving a refreshing and non-sticky skin feel.
Textile Industry: Used as a softener and antistatic agent, can be used alone or compounded with cationic softeners to impart a soft and smooth hand feel to fabrics, and significantly reduce static buildup caused by friction during processing of synthetic fibers, enhancing finishing effects and wearing comfort.
Plastics Industry: Used as an internal lubricant and antistatic agent in processing of PVC, polyolefins, etc., recommended addition amount is 0.1%-1%, effectively improving melt fluidity, reducing processing friction, and preventing dust adsorption on product surface due to static electricity.
Pesticide Formulations: Used as an emulsifier in emulsifiable concentrates, emulsions, etc., enabling highly dispersed oil-soluble active ingredients in water-based systems and forming stable emulsions, ensuring uniform coverage and efficacy during field spraying.