Cloxacillin Impurity 7 CAS CATO-C4X-15977
| CAS No. | CATO-C4X-15977 |
| Molecular Formula | C21H22ClN3O7S |
| Molecular Weight | 495.93 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 Cloxacillin Impurity 7 (CAS CATO-C4X-15977), a pharmacopoeial impurity reference standard (molecular formula C21H22ClN3O7S, MW 495.93 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, Cloxacillin Impurity 7 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 495.93 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), Cloxacillin Impurity 7 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 | C21H22ClN3O7S |
| Molecular Weight | 495.93 g/mol |
| Purity | 97%+ |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cloxacillin Standards
- Cloxacillin Impurity 38 (CAS CATO-C4X-159738)
- Cloxacillin Impurity 22 (CAS CATO-C4X-159722)
- Cloxacillin Impurity 5 (CAS CATO-C4X-15975)
- Cloxacillin Impurity 21 (CAS CATO-C4X-159721)
- Cloxacillin Impurity 8 (CAS 76788-83-5)
- Cloxacillin Impurity 20 (CAS CATO-C4X-159720)
- Cloxacillin EP Impurity A (CAS 1642629-96-6)
- Cloxacillin Impurity 25 (CAS CATO-C4X-159725)
Recommended Standards
- 1246965-91-2 4701AA 6-(1H-Benzo[d][1,2,3]triazole-5-carbonyl)-2-(3-(4-chlorophenyl)ureido)-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide C22H18ClN7O3S (CAS 1246965-91-2)
- N-[(4-Chlorophenyl)methyl]-4-{3-[3-(trifluoromethyl)phenyl]-2H,4H,5H,6H-cyclopenta[c]pyrazol-2-yl}benzamide (CAS 866018-76-0)
- N,N’-(4-Chloro-5-nitro-1,2-phenylene)bis(4-methylbenzenesulfonamide) (CAS 113269-04-8)
- 1-(2-(2-Chloro-6H-indolo[2,3-b]quinoxalin-6-yl)acetyl)-4-(4-hydroxybenzylidene)-3-methyl-1H-pyrazol-5(4H)-one (CAS 119457-13-5)
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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