Dodecyl/tetradecyl dimethyl amine oxide is an amine oxide based zwitterionic surfactant with a c14â (tetradecyl) alkyl tail. It is used as a foam stabilizer and hair conditioning agent in someâ shampoosâ andâ conditioners. Like other amine oxide based surfactants it isâ antimicrobial, being slightly more effective thanâ lauryldimethylamine oxideâ against the common bacteriaâ s. Aureusandâ e. Coli. -