SPL Set ID: 50f706f9-5003-4e15-bece-85b6213b1f5c

Rifampin Capsules USP for oral administration contains 150 mg or 300 mg rifampin per capsule. The 150 mg and 300 mg capsules also contain, as inactive ingredients: corn starch, crospovidone, D & C Red no. 28, FD & C Blue no. 1, FD & C Red no. 40, gelatin, magnesium stearate, potassium hydroxide, pregelatinized starch, propylene glycol, shellac, sodium lauryl sulphate and titanium dioxide. Rifampin is a semisynthetic antibiotic derivative of rifamycin SV. Rifampin is a red-brown crystalline powder very slightly soluble in water at neutral pH, freely soluble in chloroform, soluble in ethyl acetate and in methanol. Its molecular weight is 822.95 and its chemical formula is C 43 H 58 N 4 O 12 . The chemical name for rifampin is either: 3-[[(4-Methyl-1-piperazinyl)imino]methyl]rifamycin or 5,6,9,17,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22–heptamethyl-8-[N-(4-methyl-1-piperazinyl)formimidoyl]-2,7-(epoxypentadeca[1,11,13]trienimino)naphtho[2,1- b ]furan-1,11(2H)-dione 21-acetate. Its structural formula is: Structural Formula