Glycereth-25 Pca Isostearate
Glycereth-25 PCA Isostearate is a polyethoxylated glycerin ester derived from PCA (pyrrolidone carboxylic acid) and isostearic acid, with an average of 25 moles of ethylene oxide. Its full chemical name is poly(oxy-1,2-ethanediyl), α,α′,α″-1,2,3-propanetriyltris-ω-hydroxy-, esters with 5-oxo-L-proline and isooctadecanoic acid (25 mol EO average molar ratio). It functions primarily as an emulsifier and skin-conditioning agent in cosmetic formulations. It appears across a wide range of product types including toners, serums, cleansing pads, and mists.
As an emulsifier, it helps stabilize oil-in-water or water-in-oil formulations, enabling uniform product texture. Its skin-conditioning function suggests it may contribute to a smoother, softer skin feel. The source does not provide clinical evidence for specific skin benefits beyond these functional roles.
