SPL Set ID: 9a63da11-01be-4c63-a260-e6bdbb4a7a69
1 drug(s) with this SPL Set ID
Ery 2% Pads contain erythromycin, USP for topical dermatologic use. Erythromycin is a macrolide antibiotic produced from a strain of Saccaropolyspora erythraea (formerly Streptomyces erythreus ). It is a base and readily forms salts with acids. Chemically, erythromycin is C 37 H 67 NO 13 . It has the following structural formula: The chemical name for erythromycin is (3 R *,4 S *,5 S *,6 R *,7 R *,9 R *,11 R *,12 R *,13 S *,14 R *)-4-[(2,6-Dideoxy-3- C -methyl-3- O -methyl-α-L- ribo -hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-β-D- xylo -hexopyranosyl]oxy] oxacyclotetradecane-2,10-dione. Erythromycin has the molecular weight of 733.94. It is a white or slightly yellow, crystalline powder, slightly soluble in water, soluble in alcohol, in chloroform, and in ether. It is odorless or practically odorless. It has a pH range between 8.0 and 10.5 in a methanol and water solution prepared by diluting 1 volume of a methanol solution, containing 40 mg per mL, with 19 volumes of water. Each mL of expressible liquid contains 20 mg erythromycin in a base of dehydrated alcohol, propylene glycol and citric acid to adjust pH. Each pledget is filled to contain 0.8 mL of Erythromycin Topical Solution 2%. Chemical structure