Cefixime Side Chain Acid Active Ester CAS 89605-09-4
| CAS No. | 89605-09-4 |
| Molecular Formula | C18H18N4O4S3 |
| Molecular Weight | 450.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Cefixime Side Chain Acid Active Ester (CAS 89605-09-4), a certified reference material (molecular formula C18H18N4O4S3, MW 450.55 g/mol) for analytical method development and quality control.
Structurally, Cefixime Side Chain Acid Active Ester (C18H18N4O4S3) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 450.55 g/mol, it falls into the moderately-high-molecular-weight range. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C18H18N4O4S3 |
| Molecular Weight | 450.55 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 |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 3 |
Related Cefixime Standards
- Cefixime Impurity 41 (CAS CATO-C4X-113941)
- Cefixime Impurity 42 (CAS CATO-C4X-113942)
- Cefixime Impurity 27 (CAS 29126-11-2)
- Cefixime (CAS 79350-37-1)
- Cefixime Impurity 14 (CAS CATO-C4X-113914)
- Cefixime Impurity 15 (CAS CATO-C4X-113915)
- Cefixime EP Impurity C (CAS 108691-83-4)
- Cefixime Impurity 54 (CAS CATO-C4X-113954)
Recommended Standards
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Why CATO?
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