Cefotaxime Impurity 76 CAS CATO-C4X-120176
| CAS No. | CATO-C4X-120176 |
| Molecular Formula | C14H15N5O6S2 |
| Molecular Weight | 413.43 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.
Cefotaxime Impurity 76 (CAS CATO-C4X-120176) is a certified pharmaceutical impurity reference standard with the molecular formula C14H15N5O6S2 and a molecular weight of 413.43 g/mol.
Cefotaxime Impurity 76 (C14H15N5O6S2) contains a nitrogen-containing heterocyclic scaffold, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C14H15N5O6S2 |
| Molecular Weight | 413.43 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefotaxime Standards
- Cefotaxime EP Impurity B (CAS 66340-28-1)
- Cefotaxime Impurity 21 (CAS CATO-C4X-120121)
- Cefotaxime Impurity 24 (CAS CATO-C4X-120124)
- Cefotaxime open ring lactone (CAS CATO-C4X-120141)
- Cefotaxime Impurity 97 (CAS CATO-C4X-120197)
- Cefotaxime Impurity 50 (CAS CATO-C4X-120150)
- Cefotaxime Impurity 50 (CAS CATO-C4X-120157)
- Cefotaxime Impurity 95 (CAS CATO-C4X-120195)
Recommended Standards
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- Apixaban Impurity 73 (CAS CATO-C4X-108873)
- Octreotide EP Impurity G Acetate (CAS 108102-47-2（free base）)
- Piracetam Impurity 10 (CAS 220223-43-8)
- Estradiol Impurity 52 (CAS CATO-C4X-163652)
- 6-Hydroxynicotinonitrile (CAS 94805-52-4)
- 2-Amino-6-chloro-5-nitro-4(3H)-pyrimidone (CAS 1007-99-4)
- 2-(1h-1,2,4-Triazol-1-yl)isonicotinimidamide (CAS 1016530-23-6)
- 2-(3-Methoxyphenyl)-2-(piperidin-1-yl)acetic acid (CAS 1017378-43-6)
- N-Benzyl-2-fluoroaniline hydrochloride (CAS 1987680-56-7)
- 1-Cyclohexyl-6-oxo-2-phenylpiperidine-3-carboxylic acid (CAS 477890-12-3)
- Insulin Degludec Impurity 18 (CAS CATO-C4X-215718)
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