SPL Set ID: 69934bbb-922c-4752-b253-f2f07340de8d

Each teaspoonful (5 mL) of Promethazine Hydrochloride Syrup (Promethazine Hydrochloride Oral Solution, USP) contains 6.25 mg promethazine HCl in a flavored syrup base with a pH between 4.9 and 5.4. Alcohol 8%(v/v). The inactive ingredients present are: anhydrous citric acid, ascorbic acid, D&C yellow No. 10, edetate disodium, FD&C blue No. 1 powder, FD&C red No. 40, glycerin, methylparaben, natural and artificial strawberry banana flavor, natural fruit punch flavor, purified water, sodium benzoate, sodium citrate, sodium propionate, sodium saccharin, and sucrose. Promethazine hydrochloride is a racemic compound; the empirical formula is C 17 H 20 N 2 S•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: 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 and soluble in alcohol. structure