Cefazolin EP Impurity C CAS 56842-77-4
| CAS No. | 56842-77-4 |
| Molecular Formula | C11H12N6O4S |
| Molecular Weight | 324.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Cefazolin EP Impurity C.
CATO supplies Cefazolin EP Impurity C (CAS 56842-77-4), a pharmacopoeial impurity reference standard (molecular formula C11H12N6O4S, MW 324.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Cefazolin EP Impurity C (C11H12N6O4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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.
Physical & Chemical Properties
| Molecular Formula | C11H12N6O4S |
| Molecular Weight | 324.32 g/mol |
| Purity | >90% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Related Cefazolin Standards
- Cefazolin EP Impurity G (CAS 1172998-53-6)
- Cefazolin Impurity 61 (CAS CATO-C4X-157761)
- Cefazolin Impurity 63 (CAS CATO-C4X-157763)
- Cefazolin 3-Hydroxymethyl Impurity Sodium Salt (CAS 50971-65-8)
- Cefazolin Impurity 11 (CAS 478494-71-2)
- Cefazolin EP Impurity J (CAS 1675245-00-7)
- Cefazolin USP Related Compound D(Diastereoisomer Mixture) (CAS 1675245-01-8)
- Cefazolin Impurity 89 (CAS CATO-C4X-157789)
Recommended Standards
- N-(2-methoxy-5-nitrophenyl)-2-((1-methyl-1H-tetrazol-5-yl)thio)acetamide (CAS 378225-56-0)
- Tafluprost Impurity 16 (CAS 209861-01-8)
- N-((3-(trifluoromethyl)phenyl)carbamothioyl)benzamide (CAS 89069-94-3)
- 7-(Tert-butyl) 3-methyl 4-hydroxy-2-oxo-2,5,6,8-tetrahydro-1,7-naphthyridine-3,7(1H)-dicarboxylate (CAS 1005333-37-8)
- Risperidone EP Impurity A (CAS 691007-09-7)
- Lornoxicam impurity 63 (CAS CATO-C4X-201663)
- Ibuprofen Impurity 23 (CAS 7645-81-0)
- Ethyl 3-amino-5-methylhexanoate hydrochloride (CAS 90726-94-6)
- Methyl 1,3-dimethyl-2,4,7-trioxo-1,2,3,4,7,8-hexahydropyrido[2,3-d]pyrimidine-6-carboxylate (CAS 501005-88-5)
- 1-tert-butyl 4-methyl 4-fluoropiperidine-1,4-dicarboxylate (CAS 1048994-21-3)
- 2-Benzyl-4-chloro-5-hydrazinylpyridazin-3(2H)-one (CAS 96017-19-5)
- trans-1-Benzyl 3-methyl 4-(4-chlorophenyl)pyrrolidine-1,3-dicarboxylate (CAS 2140264-30-6)
- Semaglutide impurity 39 (CAS CATO-C4X-222639)
- MOTS-c Peptide (CAS 1627580-64-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com