what are buffering agents in makeup
Sodium Silicate is formed when metal cations (sodium) combine with silica. Sodium Silicate functions as a buffering agent, corrosion inhibitor and a pH adjuster in cosmetics. Buffering agents, commonly called buffers, are chemicals which have the property of maintaining the pH of an aqueous medium in a narrow range even if small amounts of acids or bases are added.
Sodium Silicate, Sodium Metasilicate and Potassium Silicate may be used in cosmetics and personal care products marketed in Europe according to the general provisions of the Cosmetics Regulation of the European Union.