Sodium dodecylbenzenesulfonate

Sodium dodecylbenzenesulfonate (CAS 25155-30-0), also known as DDBS or LAS-C12 and sold under trade names including Marlon A, Marlon A 350, and Ultrawet 1T, is an anionic surfactant derived from the sulfonation of dodecylbenzene. It carries no assigned E-code and is classified under HS code 29041000.

In industrial cleaning formulations, its sulfonate head group adsorbs onto grease and particulate surfaces, reducing interfacial tension and enabling mechanical removal during washing cycles. Water treatment operations use it as a dispersant to break up oil emulsions, while textile processors apply it during scouring to strip sizing agents and natural oils from fiber surfaces.

The material is supplied as white or light-yellow flakes and is subject to REACH registration requirements within the EU. Grades vary in active content, with Marlon A 350 representing a standard commercial specification. Procurement teams should confirm SDS documentation and REACH compliance status with the supplier prior to ordering.