Category
Azithromycin
CAS Number
83905-01-5
Alternate CAS Number
117772-70-0 (Azithromycin Dihydrate - API (Dihydrate Salt)) , 121470-24-4 (Monohydrate Salt)
Molecular Formula
C₃₈H₇₂N₂O₁₂
Molecular Weight
748.98 g/mol
Catalogue Number
MLS-AZM-STD
Synonym

Azithromycin A; (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one (USP);(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one;

Keywords
Fine Chemicals
Pharmaceutical Standards
Intermediates
High-Quality Pharmaceutical Reference Standards
Slide_1

Azithromycin Standard (CAS No.: 83905-01-5; Molecular Formula: C₃₈H₇₂N₂O₁₂; Molecular Weight: 748.98 g/mol) is a high-purity pharmaceutical analytical reference standard used for Azithromycin API identification, assay determination, impurity profiling, analytical method development, and pharmaceutical quality control. Manasa Life Sciences is an India-based manufacturer and supplier of pharmaceutical reference standards, providing quality-focused materials supported by HPLC, LC-MS, NMR (¹H, qNMR, and ¹³C NMR) analytical testing reports, along with a Typical Potency CoA. These analytical resources support purity assessment, identity confirmation, structural characterization, and quality-control workflows aligned with applicable EMA, ICH, USP, Ph. Eur., GLP, and GDP practices.