methylbenzethonium chloride
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meth·yl·ben·ze·tho·ni·um chlo·ride
(meth'il-ben-zĕ-thō'nē-ŭm),A quaternary ammonium compound having a surface action like that of other cationic detergents; generally germicidal and bacteriostatic; used to rinse infant diapers and bed linen in the prevention of ammonia dermatitis.