What it is
Polyglyceryl-2 diisostearate is an ester formed from diglycerol and isostearic acid, giving it a low water affinity that suits water-in-oil emulsions. It functions as an emulsifier and emulsion stabilizer, helping bind oil and water phases and disperse pigments and mineral UV filters smoothly. It also conditions the skin and contributes a cushiony, spreadable texture often used in creams and balms.
Safety & warnings
Polyglyceryl esters such as polyglyceryl-2 diisostearate are generally well tolerated and have a mild profile, which makes them common in low-irritation and water-in-oil sunscreen systems. It is not a recognized fragrance allergen. As a rich fatty ester it is best evaluated within the full formula for those very prone to clogged pores, though it is widely used in leave-on products without issue.
Origin & sourcing
Made from glycerin-derived polyglycerol esterified with isostearic acid; the raw materials can be sourced from plant oils, and the finished ester is produced synthetically.
Questions everyone asks
What is polyglyceryl-2 diisostearate used for?
It is mainly an emulsifier that stabilizes water-in-oil formulas and helps disperse pigments and mineral UV filters while giving a smooth, cushiony feel.
Is it plant-derived?
Its building blocks, glycerin and isostearic acid, can be sourced from plant oils, but the final ester is produced through chemical processing.