Benzyldodecyldimethylammonium chloride

Benzyldodecyldimethylammonium chloride (CAS 139-07-1), also known as benzododecinium chloride, is a quaternary ammonium compound classified under EC 205-351-5. It carries no assigned E-code and belongs to the cationic surfactant family, distinguishing it from anionic and nonionic alternatives in formulation chemistry.

In water treatment, it disrupts bacterial cell membranes at low concentrations, making it effective as a biocide in cooling towers and process water systems. In personal care formulations, it functions as a conditioning agent and emulsifier, adsorbing onto negatively charged hair surfaces to reduce static and improve combability. Pharmaceutical manufacturers also employ it as a preservative in topical preparations.

This material is supplied as a solid and is available in technical and high-purity grades suitable for cosmetic and pharmaceutical applications. It falls under REACH registration requirements for EU market supply. Standard packaging formats include fibre drums and bags; buyers should confirm grade specifications against Ph.Eur. or internal quality standards before procurement.