SPL Set ID: bae9c9c1-107f-0fcb-e053-2a95a90a75b2

hydrochloride. The inactive ingredients present are hydroxypropyl cellulose, lactose monohydrate, low-substituted hydroxypropyl cellulose and magnesium stearate. Promethazine hydrochloride is a racemic compound; the molecular formula is C17H20N2S HCl and its molecular weight is 320.88. Promethazine hydrochloride, a phenothiazine derivative, is designated chemically as 10H-Phenothiazine-10-ethanamine, N,N,α-trimethyl-, monohydrochloride, (±)- with the following structural formula. [Structured product formula for Promethazine] Promethazine hydrochloride occurs as a white to faint yellow, practically odorless, crystalline powder which slowly oxidizes and turns blue on prolonged exposure to air. It is freely soluble in water, in hot dehydrated alcohol, and in chloroform; practically insoluble in ether, in acetone and in ethyl acetate.