Cefoxitin Impurity 15 CAS 1918-77-0
| CAS No. | 1918-77-0 |
| Molecular Formula | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefoxitin Impurity 15 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.
As a process- or degradation-related impurity, Cefoxitin Impurity 15 (CAS 1918-77-0, C6H6O2S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C6H6O2S, Cefoxitin Impurity 15 contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 142.18 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).
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 | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Cefoxitin Standards
- Cefoxitin Impurity 32 (CAS 4461-29-4)
- Cefoxitin Impurity 33 (CAS CATO-C4X-157833)
- Cefoxitin EP Impurity A Potassium Salt (CAS 37051-16-4)
- Cefoxitin EP Impurity A Sodium Salt (CAS 94089-00-6)
- Cefoxitin Sodium (CAS 33564-30-6)
- Cefoxitin Impurity 20 (CAS CATO-C4X-157820)
- Cefoxitin Impurity 43 (CAS 40514-91-8)
- Cefoxitin EP Impurity C（Cefalotin EP Impurity D） (CAS 10590-10-0)
Recommended Standards
- Rivaroxaban Impurity 51 (CAS 1918-79-2)
- Ticarcillin EP Impurity B (CAS 6964-21-2)
- Furfuryl thioformate (CAS 59020-90-5)
- 6-Methyl-2-Thiouracil (CAS 56-04-2)
- Apixaban Impurity 2 (CAS 2187409-01-2)
- Metaraminol Impurity N2 (CAS 693772-30-4)
- Daraxonrasib Impurity 4 (CAS CATO-C4X-35184)
- 1-(4-Fluorophenyl)-N-hydroxy-1H-1,2,3-triazole-4-carboximidamide (CAS 1255791-09-3)
- N-(5-acetyl-6-methyl-2-oxo-2H-pyran-3-yl)-4-chlorobenzamide (CAS 338404-93-6)
- 6-(3-Bromo-4-chlorophenyl)pyridazin-3(2H)-one (CAS 62902-74-3)
- 3-(Adamantan-1-yl)-1-ethylguanidine (CAS 803619-71-8)
- Sulfasalazine (CAS 599-79-1)
- Capecitabine Impurity 11 (CAS 111878-21-8)
- D-Ile17-Tirzepatide (CAS CATO-CPTD788917)
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