Sodium methacrylate/styrene copolymer (inci)

"Sodium" refers to the element sodium. Polymer or copolymer based on styrene (vinylbenzene) and other monomers. Acrylates are polymers or copolymers based on acrylic acid and/or other alkyl acrylates (acrylic acid esters). Methacrylates are polymers or copolymers based on methacrylic acid and/or its esters. "Copolymer" means a polymer composed of several different monomers.

Sodium methacrylates/styrene copolymer is a substance used in cosmetic preparations where it acts as an opacifier (reduces transparency and light transmission by clouding the product).