Azacitidine Impurity 56 CAS 154568-81-7
| CAS No. | 154568-81-7 |
| 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.
Azacitidine Impurity 56 (CAS 154568-81-7) is a certified pharmaceutical impurity reference standard with the molecular formula C9H13N3O5 and a molecular weight of 243.22 g/mol.
Structurally, Azacitidine Impurity 56 (C9H13N3O5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 243.22 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | 97%+ |
| 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.) | 2001 |
| Nitrogen Atoms | 3 |
Related Azacitidine Standards
- Azacitidine Impurity 28 (CAS 3530-56-1)
- Azacitidine Impurity 29 (CAS 26524-60-7)
- Azacitidine Impurity 43 (CAS 13913-16-1)
- Azacitidine Impurity 52 (CAS 77172-20-4)
- Azacitidine Impurity 53 (CAS 27921-78-4)
- Azacitidine Impurity 54 (CAS 16033-23-1)
- Azacitidine Impurity 57 (CAS 16110-07-9)
- Azacitidine Impurity 59 (CAS 89618-11-1)
Recommended Standards
- Azacitidine Impurity 60 (CAS 179239-81-7)
- Azacitidine Impurity 61 (CAS 18265-49-1)
- Azacitidine Impurity 62 (CAS 201681-19-8)
- Azacitidine Impurity 63 (CAS 218452-08-5)
- Amlodipine Impurity 23 (CAS 34148-67-9)
- Abacavir Impurity 14 (CAS CATO-C4X-152714)
- Aspirin Impurity 11 (CAS 85531-16-4)
- N1-cyclopentyl-N1-methyl-N2-(thietan-3-yl)ethane-1,2-diamine (CAS 1863099-69-7)
- 1-(4-Aminocyclohexyl)pyrrolidine-2,5-dione (CAS 1155101-56-6)
- 3-Isopropyl-2-methylpyrazolo[1,5-a]pyridine (CAS 605673-35-6)
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- Methyl 2-Amino-5-bromo-3-methylbenzoate (CAS 206548-14-3)
- 1-Thia-7-azaspiro[4.4]Nonane 1,1-dioxide hydrochloride (CAS 2089257-89-4)
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