4-(2-(1-Ethyl-3,3-dimethyl-5-(phenylsulfonyl)indolin-2-ylidene)ethylidene)-3-phenylisoxazol-5(4H)-one CAS 55203-76-4
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 55203-76-4 |
| Molecular Formula | C29H26N2O4S |
| Molecular Weight | 498.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(2-(1-Ethyl-3,3-dimethyl-5-(phenylsulfonyl)indolin-2-ylidene)ethylidene)-3-phenylisoxazol-5(4H)-one (CAS 55203-76-4) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C29H26N2O4S. Molecular weight: 498.59 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C29H26N2O4S |
| Molecular Weight | 498.59 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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- Cefprozil (E)-Isomer monohydrate (CAS 111900-24-4)
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