Glycerin Polyether-26 (G-26)

Glycerin Polyether-26 – Modified Humectant and Emulsion Stabilizer for Cosmetics

Basic Information

• INCI Name: Glycereth-26 (Glycerin Polyether-26)

• CAS Number: 31694-55-0

• Synonyms: Polyoxyethylene (26) glyceryl ether, PEG-26 glyceryl ether

• Appearance: Clear to slightly hazy viscous liquid

• Solubility: Water-soluble

• Origin: Plant-derived (glycerin) + synthetic polyether chains

Overview
Glycerin Polyether-26 (Glycereth-26) is a modified glycerin derivative produced by the reaction of glycerin with polyether monomers, where the number "26" indicates the average length of the polyether chain (26 moles of ethylene oxide). This modification enhances the hydrophilic nature of glycerin while maintaining its humectant properties. The presence of polyether chains provides additional emulsifying and stabilizing capabilities, making it a versatile ingredient in cosmetic formulations.

Chemical Structure and Synthesis
The synthesis involves the ethoxylation of glycerin with 26 moles of ethylene oxide:
Glycerin + 26 Ethylene Oxide → Glycerin Polyether-26
By controlling reaction conditions, the degree of ethoxylation is precisely achieved, optimizing the rheological properties and functionality of the final product.

Physicochemical Properties

• Humectant properties: Retains moisture, enhancing skin hydration and softness.

• Emulsifying activity: Stabilizes oil-water systems, improving emulsion stability.

• Skin conditioning: Imparts a smooth, non-greasy feel, improving product spreadability.

• Solubility: Highly soluble in water and compatible with many polar solvents.

• Mildness: Low irritation potential, suitable for sensitive skin.

• Viscosity control: Acts as a viscosity modifier, improving product texture.

Applications

• Skin care: Moisturizers, creams, lotions, serums – provides hydration and improves texture.

• Hair care: Shampoos, conditioners, styling products – enhances smoothness and manageability.

• Cleansing products: Body washes, facial cleansers – improves foam stability and skin feel.

• Emulsions: Stabilizes oil-in-water (O/W) and water-in-oil (W/O) systems.

• Sunscreens: Enhances spreading and water resistance.

Key Benefits

• Excellent moisturizing and humectant properties.

• Stabilizes emulsions, preventing phase separation.

• Improves product texture, spreadability, and skin feel.

• Mild and non-irritating – suitable for sensitive skin.

• Plant-derived glycerin base with enhanced functionality.

• Compatible with a wide range of cosmetic ingredients.

Recommended Use
Typical usage levels range from 0.5–5% of the formulation, depending on the desired moisturizing effect, emulsion stability, and viscosity. Easily incorporated into aqueous or emulsion systems at room temperature or with mild heating.

Safety and Handling

• Generally recognized as safe for use in cosmetics at recommended concentrations.

• Low irritation potential; well-tolerated by skin and eyes.

• Avoid contact with strong oxidizers.

• Store in a cool, dry place, away from direct sunlight.

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

Quality Assurance
Each batch is tested for purity, moisture content, and viscosity to ensure consistent performance.