Glycol Stearate (EGS) – Pearlescent Agent CAS 111-60-4

Glycol Stearate (Glycol Stearate, EGS) CAS 111-60-4: Structure and Properties

1. Chemical Nature

It is an ester in which one (or both) hydroxyl groups of ethylene glycol are esterified with stearic acid. In the "mono" version, the product produces a noticeable pearlescent sheen in water-oil emulsions.

2. Properties

Formula: C₂₀H₄₀O₃ (monoester); variations exist for the diester

Appearance: White pearlescent flakes

Melting point: ~60°C (depends on composition)

Solubility: Poor in cold water; readily soluble in organic solvents

Storage: Protect from moisture and high temperatures

3. Main Areas of Use

Detergent formulations: Imparts an aesthetic pearlescent effect and increases foam density.

Care emulsions: Improves skin distribution and reduces rolling.

Industrial formulations: Used as a modifier to adjust product appearance and consistency.

4. Safety

Low irritation potential: Rarely causes sensitization.

Thermal degradation: Upon overheating, may decompose with the release of corrosive vapors.

Environment: Moderately biodegradable; generally safe with adequate disposal.

5. Conclusion

EGS is a popular additive for creating a glossy, "pearlized" appearance and enhancing the sensory qualities of cosmetic products. Good compatibility with other emulsifiers and surfactants makes it indispensable in shampoos, conditioners, creams, and other care formulations.