Cetyl trimethyl ammonium chloride CTAC 30% solution is a cationic surfactant that is mainly used in creme rinses and hair conditioners. As a cationic surfactant, it is absorbed onto negatively charged surfaces without leaving a visible film, for example on the hair. This product also has applications in the manufacture of antistatic fixatives for permanent waving, hair lotions, shampoos and styling creams.