Cefmetazole Impurity 11 CAS 55817-29-3
| CAS No. | 55817-29-3 |
| Molecular Formula | C4H5NO2S |
| Molecular Weight | 131.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefmetazole Impurity 11 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.
Cefmetazole Impurity 11 (CAS 55817-29-3) is a certified pharmaceutical impurity reference standard with the molecular formula C4H5NO2S and a molecular weight of 131.15 g/mol.
Cefmetazole Impurity 11 (C4H5NO2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. 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.
Physical & Chemical Properties
| Molecular Formula | C4H5NO2S |
| Molecular Weight | 131.15 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Cefmetazole Standards
- Cefmetazole Impurity 21 (CAS 52069-55-3)
- Cefmetazole Impurity 48 (CAS 310466-38-7)
- Cefmetazole Impurity 58 (CAS CATO-C4X-150758)
- Cefmetazole Impurity 31 (CAS 55862-52-7)
- Cefmetazole Impurity 20 (Chloroacetonitrile) (CAS 107-14-2)
- Cefmetazole Impurity 46 (CAS 17347-32-9)
- Cefmetazole Impurity 47 (CAS 4923-87-9)
- Cefmetazole impurity 75 (CAS 62671-38-9)
Recommended Standards
- 3-Fluoro-4-pyridinecarboxaldehyde 3-fluoropyridine-4-carboxaldehyde 3-fluoro-pyridine-4-carbaldehyde 3-Fluoro-4-formylpyridine 3-Fluoroisonicotinaldehyde 40273-47-0 (CAS 40273-47-0)
- 3-Amino-2-thioxoimidazolidin-4-one (CAS 117829-36-4)
- Methyl 2-isothiocyanatoacetate methyl isothiocyanatoacetate methyl 2-isothiocyanato acetate 21055-37-8 (CAS 21055-37-8)
- ((1,2,4-Thiadiazol-5-yl)amino)methanol (CAS 1190921-45-9)
- Osimertinib Impurity 113 (CAS CATO-C4X-2045113)
- Gadobutrol impurity 176 (CAS CATO-C4X-2120176)
- Loxoprofen Impurity 139 (CAS CATO-C4X-1488139)
- Dihydrotetramethylrosamine (CAS 105284-17-1)
- 1,4-Naphthoquinone-d6 (CAS 26473-08-5)
- (5E)-5-(3-chlorobenzylidene)-2-mercapto-1,3-thiazol-4(5H)-one 23622-20-0 Y-1466 (CAS 23622-20-0)
- 1-[4-(4-CHLORANYLPHENOXY)PHENYL]UREA (CAS 23822-43-7)
- Bicyclo[3.3.1]nonyl-9-one (CAS 17931-55-4)
- 2,3,4-Trifluoro-1-nitro-5-(trifluoromethyl)benzene (CAS 123973-37-5)
- Protein Kinase C? Peptide Substrate (CAS 120253-69-2)
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