SPL Set ID: c1276463-7357-45b5-9f7e-8d3c4a550ff4

The active ingredient in omeprazole delayed-release capsules, USP is a substituted benzimidazole, 5-methoxy-2-[[(4-methoxy-­3, 5-dimethyl-2-pyridinyl) methyl] sulfinyl]-1 H -benzimidazole, a compound that inhibits gastric acid secretion. Its molecular formula is C 17 H 19 N 3 O 3 S, with a molecular weight of 345.42. The structural formula is: Omeprazole USP is a white to off-white powder that melts with decomposition between 150°C and 160°C. It is a weak base, freely soluble in ethanol and methanol, and slightly soluble in acetone and isopropanol and very slightly soluble in water. The stability of omeprazole is a function of pH; it is rapidly degraded in acid media, but has acceptable stability under alkaline conditions. Omeprazole is supplied as delayed-release capsules for oral administration. Each delayed-release capsule contains either 10 mg, 20 mg or 40 mg of omeprazole in the form of enteric-coated granules with the following inactive ingredients: disodium hydrogen phosphate dihydrate, hydroxypropyl cellulose, hypromellose, lactose monohydrate, mannitol, methacrylic acid and ethyl acrylate copolymer dispersion, microcrystalline cellulose, mono and di-glycerides, polysorbate, sodium lauryl sulfate, talc, titanium dioxide, and triethyl citrate. In addition, the empty hard gelatin capsule shells also contain gelatin and iron oxide red. The capsules are printed with edible ink containing black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. Meets USP Dissolution Test 2. Chemical Structure