title: [Role of sodium pyrosulfite and L-cysteine hydrochloride in retarding discoloration of ascorbic acid injection].
authors.forename: Z P
authors.initials: ZP
authors.lastname: Cheng
authors.forename: G K
authors.initials: GK
authors.lastname: Yin
mesh_terms: D001205:Ascorbic Acid; D003545:Cysteine; D004355:Drug Stability; D011765:Pyruvaldehyde; D012996:Solutions; D013400:Sugar Acids; D013447:Sulfites
chemical_list: D012996:Solutions; D013400:Sugar Acids; D013447:Sulfites; C005200:sodium metabisulfite; D011765:Pyruvaldehyde; C011491:provitamin C; D003545:Cysteine; D001205:Ascorbic Acid