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Cetrimonium bromide
Cetrimide is a quaternary ammonium compound that is used in cosmetics and pharmaceutical formulations as an antimicrobial preservative; It may also be used as a cationic surfactant. In eye-drops, it is used as a preservative at a concentration of 0.005% w/v.
Therapeutically, cetrimide is used in relatively high concentra tions,
generally as 0.1–1.0% w/v aqueous solutions, cream or spray wounds.
as a topical antiseptic for skin, burns, and Solutions containing up to 10% w/v cetrimide are used as shampoos to remove the scales in seborrheic dermatitis. Cetrimide is also used as a cleanser and disinfectant for hard contact lenses, although it should not be used on soft lenses; as an ingredient of cetrimide emulsifying wax, and in o/w creams cetrimide cream Functional Category Antimicrobial preservative; antiseptic; cationic surfactant; disin fectant.