Oxacillin Impurity 3 CAS CATO-C4X-23213
| CAS No. | CATO-C4X-23213 |
| Molecular Formula | C21H23N3O5S |
| Molecular Weight | 429.49 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 Oxacillin Impurity 3 (CAS CATO-C4X-23213), a pharmacopoeial impurity reference standard (molecular formula C21H23N3O5S, MW 429.49 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Oxacillin Impurity 3 (C21H23N3O5S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Oxacillin Impurity 3 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 | C21H23N3O5S |
| Molecular Weight | 429.49 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Oxacillin Standards
- Oxacillin Impurity 59 (CAS CATO-C4X-232159)
- Oxacillin dioxamide (CAS CATO-C4X-232130)
- Oxacillin Impurity 44 (CAS CATO-C4X-232144)
- Oxacillin Impurity 12 (CAS CATO-C4X-232112)
- Oxacillin Impurity 45 (CAS CATO-C4X-232145)
- Oxacillin Impurity 56 (CAS CATO-C4X-232156)
- Oxacillin EP Impurity G (CAS CATO-C4X-232121)
- Oxacillin EP Impurity G (CAS 724695-30-1)
Recommended Standards
- Cefazolin Impurity 57 (CAS 134203-48-8)
- Diltiazem Impurity 16 (CAS 3036581-85-5)
- Desfuroyl Ceftiofur (CAS 120882-22-6)
- Cefotaxime Impurity 66 (CAS CATO-C4X-120166)
- Eravacycline impurity 38 (CAS CATO-C4X-293838)
- Atrasentan Impurity 14 (CAS 1140617-05-5)
- Fexofenadine Impurity 15 (CAS CATO-C4X-179415)
- 2-((3-Chlorobenzyl)oxy)isoindoline-1,3-dione (CAS 30777-86-7)
- Europine N-Oxide (CAS 65582-53-8)
- Valsartan Impurity 37 (CAS CATO-C4X-105737)
- N-Benzylbutyramide (CAS 10264-14-9)
- 7-(Methylsulfanyl)[1,3]thiazolo[4,5-g][1,3]benzothiazol-2-amine (CAS 397290-24-3)
- Methyldopa EP Impurity C (CAS 5486-79-3)
- Semaglutide impurity 73 (CAS CATO-C4X-222673)
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