Glycol Stearate (EGS) CAS 111-60-4

Glycol Stearate (EGS) – Pearlescent Agent and Viscosity Builder for Personal Care Products

Basic Information

• CAS Number: 111-60-4

• Approximate Molecular Formula (monoester): C₂₀H₄₀O₃

• Appearance: White to slightly yellowish waxy flakes or granules

• Odor: Slight, fatty

• Melting Point: 55–65°C (depending on esterification degree)

• Density: ~0.97–1.0 g/cm³ (at 25°C)

• Flash Point: >150°C

• Solubility: Practically insoluble in water; soluble in alcohols and hot oils

• Storage: Store in a cool, dry place, in tightly sealed containers, protected from light and moisture

Overview
Glycol stearate (ethylene glycol stearate, EGS) is the ester formed by the reaction of ethylene glycol and stearic acid. It is a non-ionic surfactant widely used in personal care and cosmetic products. Its primary functions include providing a pearlescent (nacreous) effect, opacifying formulations, and enhancing viscosity, thereby improving the visual appeal and texture of shampoos, shower gels, lotions, and creams.

Mechanism of Action
Glycol stearate acts as a pearlescent agent by forming microscopic crystalline platelets upon cooling of the formulation. These platelets reflect light, creating a shimmering, pearl-like appearance. Additionally, it contributes to thickening and stabilizing the emulsion, improving the consistency and sensory feel of the product.

Applications

• Shampoos and conditioners: Imparts a pearlescent sheen, adds body, and provides conditioning benefits.

• Shower gels and body washes: Enhances visual appeal and improves texture.

• Lotions and creams: Functions as an emollient, opacifier, and thickening agent.

• Facial cleansers and liquid soaps: Improves appearance and sensory properties.

• Other cosmetics: Used in foundations, sunscreens, and other emulsion-based products.

Key Benefits

• Provides an attractive pearlescent effect.

• Enhances viscosity and product stability.

• Acts as a mild conditioning agent for skin and hair.

• Compatible with a wide range of surfactants and cosmetic ingredients.

• Safe and well-tolerated at typical use levels (1–5%).

• Cost-effective and widely available.

Handling and Storage

• Generally safe and non-irritating at recommended concentrations.

• Avoid excessive heating to prevent thermal degradation.

• Store in a cool, dry place, away from strong oxidizers.

• Use appropriate personal protective equipment (gloves, safety goggles) when handling.

• Shelf life: typically 24 months under recommended storage conditions.

Quality Assurance
Each batch is tested for purity, acid value, saponification value, and melting point to ensure consistent quality.