Azithromycin impurity 62 CAS 857078-26-3
| CAS No. | 857078-26-3 |
| Molecular Formula | C37H70N2O11 |
| Molecular Weight | 718.96 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Azithromycin impurity 62 (CAS 857078-26-3), a pharmacopoeial impurity reference standard (molecular formula C37H70N2O11, MW 718.96 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C37H70N2O11, Azithromycin impurity 62 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 718.96 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Azithromycin impurity 62 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C37H70N2O11 |
| Molecular Weight | 718.96 g/mol |
| Purity | 97%+ |
| 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.) | 1987 |
| Nitrogen Atoms | 2 |
Related Azithromycin Standards
- Azithromycin EP Impurity N (CAS 612069-25-7)
- Azithromycin Impurity 34 (CAS CATO-C4X-100334)
- Azithromycin EP Impurity E (CAS 612069-27-9)
- Azithromycin Impurity 38 (CAS CATO-C4X-100338)
- Azithromycin CP Impurity Q (CAS 99290-97-8)
- Azithromycin CP Impurity R (CAS 161193-44-8)
- Azithromycin Impurity 23 (CAS CATO-C4X-100323)
- Azithromycin Impurity 50 (CAS CATO-C4X-100350)
Recommended Standards
- Diindeno[7,1-de:1′,7′-fg][1,3,2]dioxaphosphocin, 10,11,12,13-tetrahydro-5-hydroxy-3,7-bis[2,4,6-tris(1-methylethyl)phenyl]-, 5-oxide (CAS 2171300-28-8)
- Iomeprol Impurity 3 (CAS CATO-C4X-18203)
- (R)-STRIP (CAS 1372719-95-3)
- Iopromide EP Impurity A (CAS 154361-51-0)
- Cefaclor Impurity 63 (CAS CATO-C4X-127063)
- Oxybuprocaine Impurity 1 (CAS CATO-C4X-28331)
- (E)-Cefuroxime Sodium Impurity 43 (CAS CATO-C4X-124543)
- 6-Ethylpyrimidin-4-amine (CAS 856160-67-3)
- 2-(Cyclohexylmethyl)-4-(methylthio)phenol (CAS 1243363-17-8)
- 1-(3,5-dichlorophenyl)-2,6,6-trimethyl-4,5,6,7-tetrahydro-1H-indol-4-one 627836-66-2 MS-10354 (CAS 627836-66-2)
- 4-((3,4-Dihydroxybenzylidene)amino)-3-(3-ethoxyphenyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 497922-01-7)
- 2,4-Dihydroxy-3-methoxybenzaldehyde (CAS 58922-29-5)
- 2-(4-Chloro-3-methyl-1h-pyrazol-1-yl)phenol (CAS 1341155-23-4)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
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