Cefotaxime Impurity 44 CAS 47288-83-5
| CAS No. | 47288-83-5 |
| Molecular Formula | C16H18N2O4S |
| Molecular Weight | 334.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefotaxime Impurity 44 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.
Cefotaxime Impurity 44 (CAS 47288-83-5) is a certified pharmaceutical impurity reference standard with the molecular formula C16H18N2O4S and a molecular weight of 334.39 g/mol.
Based on its molecular formula C16H18N2O4S, Cefotaxime Impurity 44 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 334.39 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C16H18N2O4S |
| Molecular Weight | 334.39 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1970 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Cefotaxime Standards
- Cefotaxime Impurity 43 (CAS 2172369-67-2)
- Cefotaxime Impurity 42 (CAS CATO-C4X-120142)
- Cefotaxime Impurity 36 (CAS CATO-C4X-120136)
- Cefotaxime Impurity 37 (CAS CATO-C4X-120137)
- Cefotaxime Impurity 47 (CAS 474956-63-3)
- Cefotaxime Impurity 60 (CAS 1950566-47-8)
- Cefotaxime Impurity 69 (CAS CATO-C4X-120169)
- Cefotaxime Impurity 49 (CAS 130468-09-6)
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