Oxacillin Impurity 43 CAS CATO-C4X-232143
| CAS No. | CATO-C4X-232143 |
| Molecular Formula | C19H19N3O6S |
| Molecular Weight | 417.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Oxacillin Impurity 43 (CAS CATO-C4X-232143, C19H19N3O6S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Oxacillin Impurity 43 (C19H19N3O6S) contains a flavonoid core, 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 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C19H19N3O6S |
| Molecular Weight | 417.44 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 9 (CAS CATO-C4X-23219)
- Oxacillin Monohydrate EP Impurity F (CAS 5053-35-0)
- Oxacillin Impurity 60 (CAS CATO-C4X-232160)
- Oxacillin Impurity 57 (CAS CATO-C4X-232157)
- Oxacillin Impurity 47 (CAS CATO-C4X-232147)
- Oxacillin Impurity 3 (CAS CATO-C4X-23213)
- Oxacillin Impurity 59 (CAS CATO-C4X-232159)
- Oxacillin dioxamide (CAS CATO-C4X-232130)
Recommended Standards
- Osimertinib Impurity 12 (CAS 2213409-62-0)
- N-(5-(3,5-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl)-3-(ethylsulfonyl)benzamide (CAS 886919-92-2)
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- N-(4-(3-Nitrophenyl)thiazol-2-yl)-4-phenoxybenzamide (CAS 313404-06-7)
- Lanreotide Impurity 9 (CAS 109605-17-6)
- Aminolevulinic Acid Impurity 9 (CAS CATO-C4X-21219)
- Sildenafil Impurity 89 (CAS 2520113-03-3)
- Ethyl 2-(1-hydroxyethyl)thiazole-4-carboxylate (CAS 161891-80-1)
- N,N,7-trimethyl-1H-pyrrolo[2,3-c]pyridin-5-amine (CAS 1082040-94-5)
- 4-(4-Chlorophenyl)-3-(4-methoxyphenyl)-5-((4-nitrobenzyl)thio)-4H-1,2,4-triazole (CAS 618880-63-0)
- N-Stearoyl-L-cysteine (CAS 67603-46-7)
- Tert-butyl 4-(3-hydroxybenzylidene)piperidine-1-carboxylate (CAS 1020329-87-6)
- 5-Isopropyl-2,3-dihydro-1H-inden-1-one (CAS 5120-34-3)
- D-Ala21-Tirzepatide (CAS CATO-CPTD788913)
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