Also available in 1 mL, 25 mg, 50 mg, 100 mg, 500 mg and bulk. Please contact Fisher for quotes. Azithromycin hydrate (CP-62993 dihydrate) is a semi-synthetic macrolide antibiotic structurally related to ERYTHROMYCIN. It has been used in the treatment of Mycobacterium avium intracellulare infections, toxoplasmosis, and cryptosporidiosis. Purity 99.9%