. . . "A preferred embodiment of the invention is a process for making a substantially nitrosamine-free amine oxide that is a free-flowing solid at ambient temperature (i.e. 23??? C.) by reacting a tertiary amine capable of forming an amine oxide in a polar hydroxy alkyl solvent at about 50???-100??? C. with a promoter and aqueous hydrogen peroxide, followed by azeotropic removal of the solvent, organic" .