Azacitidine Impurity 43 CAS 13913-16-1
| CAS No. | 13913-16-1 |
| Molecular Formula | C9H13N3O5 |
| Molecular Weight | 243.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies Azacitidine Impurity 43 (CAS 13913-16-1), a pharmacopoeial impurity reference standard (molecular formula C9H13N3O5, MW 243.22 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C9H13N3O5, Azacitidine Impurity 43 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 243.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C9H13N3O5 |
| Molecular Weight | 243.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 3 |
Related Azacitidine Standards
- Azacitidine Impurity 28 (CAS 3530-56-1)
- Azacitidine Impurity 29 (CAS 26524-60-7)
- Azacitidine Impurity 52 (CAS 77172-20-4)
- Azacitidine Impurity 53 (CAS 27921-78-4)
- Azacitidine Impurity 54 (CAS 16033-23-1)
- Azacitidine Impurity 56 (CAS 154568-81-7)
- Azacitidine Impurity 57 (CAS 16110-07-9)
- Azacitidine Impurity 59 (CAS 89618-11-1)
Recommended Standards
- Milrinone Impurity 4 (CAS CATO-C4X-10914)
- 92663-36-0 Methyl 4-oxo-1,4-dihydropyrimido[1,2-b]indazole-2-carboxylate MFCD26523048 (CAS 92663-36-0)
- Thymidine-5- (CAS 240407-53-8)
- Thymidine-3- (CAS 478511-06-7)
- Montelukast Impurity 54 (CAS 89729-09-9)
- Ozenoxacin Impurity 51 (CAS CATO-C4X-279651)
- Eltrombopag Impurity 49 (CAS 67666-03-9)
- 6-(Difluoromethyl)-5-(trifluoromethyl)pyridine-2,4-diamine (CAS 1804696-79-4)
- 1-iodo-2-methylpropan-2-ol (CAS 23825-98-1)
- Benzyl[(6-chloropyridin-3-yl)methyl]methylamine (CAS 359447-55-5)
- (1-(Tetrahydrofuran-2-yl)cyclobutyl)methanamine (CAS 2138422-32-7)
- 4-(3-Ethylpyrazin-2-yl)-6-methylpyrimidin-2-amine (CAS 913322-76-6)
- (2S,4S)-2-Cyclopropylpiperidin-4-ol hydrochloride (CAS 1909288-12-5)
- D-Lys16-Tirzepatide (CAS CATO-CPTD788918)
Why CATO?
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