Azithromycin EP Impurity B CAS 307974-61-4
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 307974-61-4 |
| Molecular Formula | C38H72N2O11 |
| Molecular Weight | 732.99 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Azithromycin EP Impurity B (CAS 307974-61-4) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C38H72N2O11. Molecular weight: 732.99 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C38H72N2O11 |
| Molecular Weight | 732.99 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 25767-20-8 2,7,12,17-Porphinetetrapropionic acid, 3,8,13,18-tetramethyl-, tetramethyl ester (8CI) Tetramethyl 3,8,13,18-tetramethyl-21H,23H-porphine-2,7,12,17-tetrapropionate 21H,23H-Porphine-2,7,12,17-tetrapropanoic acid, 3,8,13,18-tetramethyl-, 2,7,12,17-tetramethyl ester 21H,23H-Porphine-2,7,12,17-tetrapropanoic acid, 3,8,13,18-tetramethyl-, tetramethyl ester Coproporphyrin I tetramethyl ester EINECS 247-253-5 NSC 89196 (CAS 25767-20-8)
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Why CATO?
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