Roccal was originally produced by Winthrop Laboratories. Its active ingredients include quaternary ammonium compounds from the family of benzalkonium chlorides and didecyl dimethyl ammonium chloride. These compounds are nitrogenous cationic surface active agents. Benzalkonium chloride is a mixture of alkylbenzyl dimethylammonium chlorides of various alkyl chain lengths. The greatest bactericidal activity is associated with the C12-C14 alkyl derivatives.