Polyglyceryl-3 diisostearate

Polyglyceryl-3 diisostearate (CAS 66082-42-6), also known as triglycerol diisostearate, is a polyglycerol-based emulsifier derived from isostearic acid and triglycerol. It stabilizes water-in-oil and oil-in-water emulsions across personal care and food-contact applications. This versatile ingredient contributes to texture and moisture retention in finished formulations. In cosmetics, it functions as a primary or co-emulsifier in anhydrous and low-water systems such as lip products, color cosmetics, and skin creams.

It supports a smooth, even texture without a heavy feel in various topical applications. Sunscreen and color cosmetic manufacturers use it to disperse pigments and UV filters uniformly within emollient bases for better coverage. In food-adjacent or edible coating applications, its polyglycerol ester structure supports emulsion stability in fat-based systems. Coatings and adhesive formulators incorporate it as a rheology modifier and dispersant for viscosity control.

The compound is essential where controlled interfacial compatibility is required in industrial processes. Polyglyceryl-3 diisostearate is supplied as a viscous liquid or semi-solid, depending on temperature and formulation grade. Cosmetic-grade material conforming to standard industry purity specifications is the most common commercial form. Food-contact and technical grades are available from select manufacturers based on specific regulatory needs.

Selection is typically driven by application requirements and compliance with global safety standards. This emulsifier remains a staple for formulators seeking reliable stability and pigment dispersion in complex chemical systems.