SPL Set ID: 5568ade8-bdc2-1a32-e054-00144ff8d46c

Erythromycin Ophthalmic Ointment, USP belongs to the macrolide group of antibiotics. The sterile ophthalmic ointment flows freely over the conjunctiva. Erythromycin base, as crystals or powder, is slightly soluble in water, moderately soluble in ether, and readily soluble in alcohol or chloroform. Erythromycin is an antibiotic produced from a strain of Streptomyces erythraeus. It is basic and readily forms a salt when combined with an acid. It has the following structural formula: C 37 H 67 NO 13 Mol. Wt. 733.94 Chemical Name: (3R • , 4S • , 5S • , 6R • , 7R • , 9R • , 11R • , 12R • , 13S • , 14R • )-4-[(2,6-Dideoxy-3- C -methyl-3- 0 -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 Each Gram Contains: ACTIVE: Erythromycin, USP 5 mg (0.5%); INACTIVES: Mineral Oil, White Petrolatum. Erythromycin (structural formula)