Domiphen bromide (CAS 538-71-6) is a small-molecule quaternary ammonium compound exhibiting antiseptic activity primarily through its function as a cationic surfactant Its positively charged molecular structure interacts with microbial membranes disrupting membrane integrity and leading to cell death Consequently it is widely studied for antimicrobial properties and applied in biological research as a surface-active disinfectant Domiphen bromide thus serves as a relevant tool compound in investigations focused on microbial control and antisepsis