Cefalotin EP Impurity B CAS 5935-65-9
| CAS No. | 5935-65-9 |
| Molecular Formula | C14H14N2O5S2 |
| Molecular Weight | 354.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Cefalotin EP Impurity B (CAS 5935-65-9), a pharmacopoeial impurity reference standard (molecular formula C14H14N2O5S2, MW 354.40 g/mol) used for the identification and quantification of trace impurities in APIs.
Cefalotin EP Impurity B (C14H14N2O5S2) 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).
As a certified reference material (CRM), Cefalotin EP Impurity B 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 | C14H14N2O5S2 |
| Molecular Weight | 354.40 g/mol |
| Purity | 97%+ |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Cefalotin Standards
- Cefalotin EP Impurity A (CAS 34691-02-6)
- Cefalotin Impurity 5 (CAS 3432-90-4)
- Cefalotin Impurity 7 (CAS CATO-C4X-12847)
- Cefalotin Impurity 6 (CAS 35565-06-1)
- Cefalotin Impurity 10 (CAS CATO-C4X-128410)
- Cefalotin EP Impurity C/Cefoperazone EP Impurity E/Cefazolin EP Impurity H (CAS 957-68-6)
- Cefalotin Impurity 9 (CAS CATO-C4X-12849)
- Cefalotin EP Impurity B (Na) (CAS 5547-29-5)
Recommended Standards
- Cefotiam Impurity 26 (CAS CATO-C4X-120426)
- Indobufen Impurity 30 (CAS CATO-C4X-179230)
- Cefotiam Impurity 12 (CAS CATO-C4X-120412)
- Indobufen Impurity 88 (CAS CATO-C4X-179288)
- Erlotinib Impurity 116 (CAS 15411-43-5)
- Flunarizine impurity 39 (CAS 19422-37-8)
- Aztreonam impurity 60 (CAS CATO-C4X-152260)
- (3-Cyano-5-cyclopropyl-2-methylphenyl)boronic acid (CAS 2225169-06-0)
- 2-(4-Methoxyphenyl)-1H-benzo[d]imidazole-5-carboxamide (CAS 178970-16-6)
- 3-Fluoro-4-methylpyrrolidine (CAS 1554028-99-7)
- Travoprost Impurity 57 (CAS CATO-C4X-192557)
- Alclometasone Dipropionate Impurity 5 (CAS 129459-98-9)
- 2-Methyl-4-(methylamino)butan-2-ol (CAS 866223-53-2)
- [a-Glu](Side chain transposition)- Semaglutide (CAS CATO-C4X-2226111)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com