Acetylcysteine Impurity 6 CAS 55748-93-1
| CAS No. | 55748-93-1 |
| Molecular Formula | C13H16N2O4S |
| Molecular Weight | 296.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Acetylcysteine Impurity 6 (CAS 55748-93-1) is a certified pharmaceutical impurity reference standard with the molecular formula C13H16N2O4S and a molecular weight of 296.34 g/mol.
Based on its molecular formula C13H16N2O4S, Acetylcysteine Impurity 6 contains a nitrogen-containing heterocyclic scaffold, 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 296.34 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Acetylcysteine Impurity 6 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.
Physical & Chemical Properties
| Molecular Formula | C13H16N2O4S |
| Molecular Weight | 296.34 g/mol |
| Purity | 97%+ |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine Impurity 13 (CAS CATO-C4X-153213)
- Acetylcysteine Impurity 57 (CAS CATO-C4X-153257)
- Acetylcysteine Impurity 8 (CAS CATO-C4X-15328)
- Acetylcysteine Impurity 50 (CAS 24125-26-6)
- Acetylcysteine impurity 74 (CAS CATO-C4X-153274)
- Acetylcysteine Impurity 40 (CAS 25779-79-7)
- Acetylcysteine Impurity N2 (CAS 30452-69-8)
- Acetylcysteine Impurity 32 (CAS 462-10-2)
Recommended Standards
- Aztreonam impurity 91 (CAS 80082-50-4)
- 5-(2-(3,5-Dimethyl-4-nitro-1H-pyrazol-1-yl)ethyl)-4-ethyl-4H-1,2,4-triazole-3-thiol (CAS 1001756-32-6)
- Citalopram Impurity 72 (CAS 62498-69-5)
- (5E)-5-[(2-Aminopyridin-3-yl)methylene]-2-mercapto-3-phenyl-3,5-dihydro-4H-imidazol-4-one 1142201-60-2 (CAS 1142201-60-2)
- Baloxavir Impurity 39 (CAS 2448416-75-7)
- Cefdinir Impurity 80 (CAS 137054-66-1)
- Dydrogesterone Impurity N3 (CAS 25093-47-4)
- 3-((4-Bromo-1h-pyrazol-1-yl)methyl)benzohydrazide (CAS 1001757-38-5)
- Methyl N-(3,5-dimethylphenyl)-N-(phenylsulfonyl)glycinate (CAS 309282-80-2)
- Ethyl 5-(2-chlorophenyl)-3aH-thieno[2,3-b]pyrrole-4-carboxylate (CAS 2009013-82-3)
- 2-Bromo-5-(trifluoromethoxy)benzonitrile (CAS 1804402-93-4)
- 2-(Difluoromethyl)-3,5-dihydroxy-6-methylpyridine (CAS 1806801-46-6)
- 4-(1-Piperidinylmethyl)benzenecarboximidamide (CAS 912770-55-9)
- D-Glu3-Tirzepatide (CAS CATO-CPTD788927)
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