PEG Sorbitan Ester

PEG Sorbitan Ester – Versatile Non‑Ionic Emulsifier for Cosmetics, Pharmaceuticals, and Food

Chemical Structure and Synthesis
PEG sorbitan ester is a derivative of sorbitan (a cyclic sugar alcohol) in which one or more hydroxyl groups are substituted with polyethylene oxide (PEG) chains. The synthesis involves the reaction of sorbitan with polyethylene oxide in the presence of acid catalysts, producing a non‑ionic surfactant with an excellent balance of hydrophilic and lipophilic properties. The degree of ethoxylation can be adjusted to achieve the desired hydrophilic‑lipophilic balance (HLB), making these esters suitable for a wide range of emulsion systems.

Physicochemical Properties

• High emulsifying activity – effectively reduces interfacial tension, promoting the formation and stability of oil‑in‑water (O/W) emulsions.

• Non‑ionic nature – ensures mildness, low skin irritation potential, and compatibility with a wide range of ingredients and pH levels.

• Thermal stability – maintains performance under normal processing and storage conditions.

• Water solubility – improved by PEG modification, facilitating incorporation into aqueous formulations.

• Biodegradable – derived from renewable natural sources (sorbitol from plant starch, PEG from ethylene oxide).

• Provides smooth, elegant textures with a pleasant skin feel.

Applications

• Cosmetics and personal care: Creams, lotions, moisturizers, sunscreens, makeup removers, shampoos, and conditioners – provide stable, elegant O/W emulsions with excellent spreadability and a light, non‑greasy feel.

• Pharmaceuticals: Used as emulsifiers and solubilizers in topical ointments, creams, and drug delivery systems.

• Food industry: Used as food emulsifiers in various applications, including baked goods, confectionery, and dairy products.

• Other: Suitable for use in self‑emulsifying systems and as co‑emulsifiers in complex formulations.

Key Benefits

• Effective O/W emulsification with stable, fine textures.

• Improve product spreadability and sensory feel.

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

• Biodegradable and environmentally friendly.

• Compatible with a wide range of cosmetic, pharmaceutical, and food ingredients.

• Provide excellent water solubility for easy formulation.

• Acts as a co‑emulsifier, stabilizer, and thickener in complex formulations.

Recommended Use
Typical usage levels range from 1–5% of the formulation, depending on the desired emulsion stability and viscosity. For optimal performance, dissolve in the oil phase at elevated temperatures (60–70°C) before emulsification. Can be combined with co‑emulsifiers and thickeners for tailored rheology.

Safety and Handling

• Generally recognized as safe for use in cosmetics, pharmaceuticals, and food at recommended concentrations.

• Low irritation potential; well‑tolerated by skin.

• Avoid contact with strong oxidizers and acids.

• 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 HLB value, purity, and emulsification performance to ensure consistent quality.