SPL Set ID: d7b30c78-c531-4dc5-9552-d68daa3210d1

Each mL for oral administration contains 10 mg methadone hydrochloride USP. Methadone hydrochloride is chemically described as 6-(dimethylamino)-4,4-diphenyl-3-hepatanone hydrochloride. Methadone hydrochloride USP is a white powder that is water soluble. Its molecular formula is C 21 H 27 NO•HCl and it has a molecular weight of 345.91. Methadone hydrochloride has a melting point of 235°C, and a pKa of 8.25 in water at 20°C. Its octanol/water partition coefficient at pH 7.4 is 117. A solution (1:100) in water has a pH between 4.5 and 6.5. It has the following structural formula: Each mL of the unflavored liquid concentrate, for oral administration, contains 10 mg of methadone hydrochloride USP. The inactive ingredients are: citric acid, sodium benzoate and water. Each mL of the cherry flavored liquid concentrate, for oral administration, contains 10 mg of methadone hydrochloride USP. The inactive ingredients are: citric acid, cherry pistachio flavor, D&C Red #33, FD&C Red #40, glycerin, propylene glycol, saccharin sodium, sodium benzoate, sorbitol solution, sucrose and water. CHEMICAL STRUCTURAL