What it is
Glyceryl behenate/eicosadioate is a copolymer-type ester formed by reacting glycerin with the long-chain behenic acid and the diacid eicosanedioic (eicosadioic) acid. The resulting waxy material thickens emulsions, helps stabilize oil-and-water systems, and contributes a smooth, structured feel to creams and sunscreens. It is commonly used to build body and improve the spreadability and skin feel of higher-SPF formulas.
Safety & warnings
A large, inert ester wax that is generally well tolerated and not associated with notable irritation or sensitization in typical use levels.
Origin & sourcing
Synthetic; manufactured by esterifying glycerin with behenic acid and eicosanedioic acid, both long-chain fatty acid components.
Questions everyone asks
What does glyceryl behenate/eicosadioate do in a sunscreen?
It acts as a thickener and emulsion stabilizer, giving the product structure and a smooth, even texture on application.
Is it a natural or synthetic ingredient?
It is a synthetic ester made by combining glycerin with long-chain fatty acid components.