Cefazolin Impurity N14 CAS 21743-64-6
| CAS No. | 21743-64-6 |
| Molecular Formula | C3H4N4O2 |
| Molecular Weight | 128.09 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Cefazolin Impurity N14 (CAS 21743-64-6) is a certified pharmaceutical impurity reference standard with the molecular formula C3H4N4O2 and a molecular weight of 128.09 g/mol.
Based on its molecular formula C3H4N4O2, Cefazolin Impurity N14 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 128.09 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).
As a certified reference material (CRM), Cefazolin Impurity N14 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 | C3H4N4O2 |
| Molecular Weight | 128.09 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°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 |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 4 |
Related Cefazolin Standards
- Cefazolin USP RC A (CAS 21732-17-2)
- Cefazolin Impurity 53 (CAS 26476-16-4)
- Cefazolin EP Impurity E(Cefazolin USP RC E) (CAS 29490-19-5)
- Cefazolin Impurity 46 (CAS 18686-82-3)
- Cefazolin Impurity 26 (CAS 1925-78-6)
- Cefazolin Impurity 39 (CAS 13616-37-0)
- Cefazolin Impurity 28 (CAS 26240-90-4)
- Cefazolin Impurity 44 (CAS 20198-75-8)
Recommended Standards
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- 2-Amino-5-fluoropyridin-3-ol (CAS 1003711-04-3)
- Etomidate impurity 70 (CAS CATO-C4X-188470)
- Milrinone Impurity 3 (CAS 98293-81-3)
- N-Nitroso Ambroxol impurity 119 (CAS CATO-C4X-1085119)
- 4-Bromo-3-(difluoromethyl)-5-(trifluoromethoxy)aniline (CAS 1805521-84-9)
- 4-Chloro-2-nitro-5-trifluoromethylphenylamine, 97% (CAS 167415-22-7)
- 7-Fluoronaphthalen-1-yl trifluoromethanesulfonate (CAS 797041-33-9)
- 2-Methoxyacridine-9-carbaldehyde (CAS 113965-30-3)
- 5,6-Diamino-2,4-dihydroxypyrimidine hemisulfate (CAS 63981-35-1)
- 6-Amino-7-azaindole Dihydrochloride (CAS 1170585-19-9)
- Endo-Gly4-Semaglutide (CAS CATO-C4X-222679)
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