Ampicillin Impurity 76 CAS CATO-C4X-144376
| CAS No. | CATO-C4X-144376 |
| Molecular Formula | C32H36N6O7S2 |
| Molecular Weight | 680.79 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Ampicillin Impurity 76 (CAS CATO-C4X-144376) is a certified pharmaceutical impurity reference standard with the molecular formula C32H36N6O7S2 and a molecular weight of 680.79 g/mol.
Ampicillin Impurity 76 (C32H36N6O7S2) 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. 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 supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C32H36N6O7S2 |
| Molecular Weight | 680.79 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 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 2 |
Related Ampicillin Standards
- Ampicillin Impurity 36 (CAS CATO-C4X-144336)
- Ampicillin Impurity 75 (CAS CATO-C4X-144375)
- Ampicillin Impurity 47 (CAS CATO-C4X-144347)
- Ampicillin Impurity 59 (CAS CATO-C4X-144359)
- Ampicillin Dimer Impurity 63 (CAS CATO-C4X-144363)
- Ampicillin Trihydrate EP Impurity M (CAS CATO-C4X-144344)
- Ampicillin Impurity 48 (CAS 62326-82-3)
- Ampicillin Impurity 72 (CAS CATO-C4X-144372)
Recommended Standards
- Naltrexone impurity 39 (CAS CATO-C4X-147539)
- Naltrexone EP Impurity D (CAS 607732-61-6)
- Cefradine Impurity 15 (CAS CATO-C4X-121515)
- Tirzepatide Impurity 22 X TFA Salt (CAS CATO-C4X-324022)
- Procaine Impurity 16 (CAS 2572-39-6)
- Lamivudine Impurity B (CAS 141434-39-1)
- Cimetidine Impurity 16 (CAS 1185237-29-9)
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- 2-(5-Methylpyridin-2-yl)propan-2-ol hydrochloride (CAS 2155852-20-1)
- Carfilzomib Impurity 50 (CAS CATO-C4X-102250)
- 1-(3,5-Dinitrobenzoyl)-1,4-diazepane (CAS 1240573-39-0)
- 4-Methoxy-[7-13C]benzyl Alcohol 4-Methoxy-benzenemethanol-13C 76104-36-4 (CAS 76104-36-4)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
Why CATO?
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