Cloxacillin Impurity 20 CAS CATO-C4X-159720
| CAS No. | CATO-C4X-159720 |
| Molecular Formula | C19H22ClN3O6S |
| Molecular Weight | 455.91 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Cloxacillin Impurity 20 (C19H22ClN3O6S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Cloxacillin Impurity 20 (CAS CATO-C4X-159720) is a certified pharmaceutical impurity reference standard with the molecular formula C19H22ClN3O6S and a molecular weight of 455.91 g/mol.
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.
CATO manufactures Cloxacillin Impurity 20 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 | C19H22ClN3O6S |
| Molecular Weight | 455.91 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cloxacillin Standards
- Cloxacillin EP Impurity A (CAS 1642629-96-6)
- Cloxacillin Impurity 25 (CAS CATO-C4X-159725)
- Cloxacillin Impurity 13 (CAS 5053-36-1)
- Cloxacillin Impurity 6 (CAS CATO-C4X-15976)
- Cloxacillin Impurity 42 (CAS CATO-C4X-232142)
- Cloxacillin Impurity 21 (CAS CATO-C4X-159721)
- Cloxacillin Impurity 8 (CAS 76788-83-5)
- Cloxacillin Impurity 5 (CAS CATO-C4X-15975)
Recommended Standards
- 2-(3-(4-Chlorophenyl)-5-(furan-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)-2-oxoethyl 2-(methylthio)nicotinate (CAS 473671-25-9)
- Dacomitinib Impurity 8 (CAS CATO-C4X-20868)
- 2-(1-(3-Chloro-4-morpholinophenyl)-2,5-dimethyl-1H-pyrrol-3-yl)-N-(4-fluorophenyl)-2-oxoacetamide (CAS 860610-34-0)
- (R)-2-Cl-Phox-Bn (CAS 2634687-74-2)
- Levofloxacin Impurity 98 (CAS CATO-C4X-137198)
- Desloratadine Impurity 24 (CAS CATO-C4X-143024)
- Ixazomib Impurity 79 (CAS 389799-97-7)
- 3,4-Dichloroquinoline (CAS 25836-11-7)
- H-Lys(ivdde)-OH (CAS 919281-76-8)
- Conjugated Estrogens EP Impurity K (CAS 651-55-8)
- (1E)-N-(4-Bromo-2-fluorophenyl)-1-{4-[(2,4-dichlorophenyl)methoxy]phenyl}methanimine (CAS 298217-76-2)
- 4-(2-Iodoethyl)-1,1'-biphenyl (CAS 178685-10-4)
- 2,4-Dimethyl-5-nitrobenzonitrile (CAS 625112-44-9)
- Semaglutide impurity 290 (CAS CATO-C4X-2226290)
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