Cefaclor EP Impurity B CAS 53994-69-7
| CAS No. | 53994-69-7 |
| Molecular Formula | C7H7ClN2O3S |
| Molecular Weight | 234.66 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 234.66 g/mol gives Cefaclor EP Impurity B distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Cefaclor EP Impurity B (CAS 53994-69-7), a pharmacopoeial impurity reference standard (molecular formula C7H7ClN2O3S, MW 234.66 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Cefaclor EP Impurity B is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 234.66 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 manufactures Cefaclor EP Impurity B under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H7ClN2O3S |
| Molecular Weight | 234.66 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Cefaclor Standards
- Cefaclor Impurity C10 (CAS 108260-07-7)
- Cefaclor Impurity 12 (CAS CATO-C4X-127012)
- Cefaclor Impurity 14 (CAS CATO-C4X-127014)
- Cefaclor Impurity 28 (CAS CATO-C4X-127028)
- Cefaclor Impurity 47 (CAS CATO-C4X-127047)
- Cefaclor Impurity 62 (CAS CATO-C4X-127062)
- Cefaclor Impurity 29 (CAS CATO-C4X-127029)
- Cefaclor Impurity 41 (CAS CATO-C4X-127041)
Recommended Standards
- N-Carbamoyl-2-chlorobenzenesulfonamide (CAS 5051-77-4)
- Indapamide Impurity 6 (CAS 2455-92-7)
- n-[(6-chloropyridin-3-yl)sulfonyl]acetamide (CAS 56479-79-9)
- 2-Chloro-4-Methylsulfonylbenzoic Acid (CAS 53250-83-2)
- Celecoxib EP Impurity A (CAS 170570-01-1)
- Revefenacin Impurity 24 (CAS CATO-C4X-203124)
- Tribenoside EP Impurity B (CAS 28713-39-5)
- 3-Benzylbenzonitrile (CAS 93717-55-6)
- 67253-01-4 Dammarane-3,25-diol,20,24-epoxy-,(3R,24S)- (CAS 67253-01-4)
- (2,5-Dimethoxyphenyl)(isoquinolin-4-yl)methanone (CAS 1187171-80-7)
- 1,1-Dichloro-1,2,3,3,3-pentafluoropropane DISCONTINUED (CAS 111512-56-2)
- Elacestrant impurity 8 (CAS 2477812-39-6)
- Methyl (R)-2-benzylpyrrolidine-2-carboxylate (CAS 869058-62-8)
- Semaglutide impurity 46 (CAS CATO-C4X-222646)
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