SPL Set ID: 71e9fff3-7283-437e-b107-72fc16f09989

Enalapril maleate, USP is the maleate salt of enalapril, the ethyl ester of a long-acting angiotensin-converting enzyme inhibitor, enalaprilat. Enalapril maleate is chemically described as L–Proline, 1–[N-[1-(ethoxycarbonyl)–3–phenylpropyl]–L–alanyl]-,(S)-,(Z)-2-butenedioate(1:1). Its empirical formula is C 20 H 28 N 2 O 5 ●C 4 H 4 O 4 , and its structural formula is: Enalapril maleate, USP is an off-white, crystalline powder with a molecular weight of 492.52. It is practically insoluble in n-Heptane (non-polar organic solvents), slightly soluble in Acetone (semi polar organic solvents), sparingly soluble in water, soluble in alcohol, freely soluble in methanol and in dimethyl formamide. Enalapril is a pro-drug; following oral administration, it is bioactivated by hydrolysis of the ethyl ester to enalaprilat, which is the active angiotensin-converting enzyme inhibitor. Enalapril maleate, USP is supplied as 2.5 mg, 5 mg, 10 mg, and 20 mg tablets for oral administration. In addition to the active ingredient enalapril maleate, USP each tablet contains the following inactive ingredients: croscarmellose sodium, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol 4000, pregelatinised starch, sodium bicarbonate and sodium stearate. The 10 mg tablets also contain red iron oxide, and 20 mg tablets also contain yellow iron oxide and red iron oxide. FDA approved dissolution test specifications differs from the USP. enalapril-maleate-stru