Clarithromycin is a macrolide antibiotic similar to erythromycin. Clarithromycin is slightly soluble in aqueous solution (0.33 µg/mL).
CAS Number
81103-11-9
Molecular Formula
C38H69NO13
Molecular Weight
747.95
Mechanism of Action
Macrolide antibiotics inhibit bacterial growth by targeting the 50S ribosomal subunit preventing peptide bond formation and translocation during protein synthesis. Resistance to clarithromycin is commonly attributed to mutations in 50S rRNA preventing clarithromycin binding allowing the cell to synthesize proteins free of error.
Storage Conditions
Store in cool, dry conditions in well sealed containers.
Tariff Code
2941.50.0000
Spectrum
Clarithromycin is a broad spectrum antibiotic targeting a wide range of gram positive and gram negative bacteria especially those which cause pharyngitis and otitis media.
Form
Powder
Appearance
White crystalline powder
Source
Semi-synthetic
Water Content (Karl Fisher)
≤ 2.0%
pH
8.0-10.0
Optical Rotation
-94° to -102°
Assay
96.0-102.0% (on dried basis)
Residue On Ignition
≤ 0.2%
Heavy Metals
≤ 0.002%
Impurities
Any related compound: ≤1.0%
Number of related compounds exceeding 0.4%:
≤ 4
Total Impurities: ≤ 3.5%