Acetylcysteine impurity 71 CAS CATO-C4X-153271
| CAS No. | CATO-C4X-153271 |
| Molecular Formula | C11H19NO9S |
| Molecular Weight | 341.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Acetylcysteine impurity 71 is closely related to a carbohydrate-derived structure, an amide group, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Acetylcysteine impurity 71 (CAS CATO-C4X-153271), a pharmacopoeial impurity reference standard (molecular formula C11H19NO9S, MW 341.33 g/mol) used for the identification and quantification of trace impurities in APIs.
Acetylcysteine impurity 71 (C11H19NO9S) contains a carbohydrate-derived structure, an amide group, a sulfone group. 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.
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.
As a certified reference material (CRM), Acetylcysteine impurity 71 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 | C11H19NO9S |
| Molecular Weight | 341.33 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine impurity 61 (CAS CATO-C4X-153261)
- Acetylcysteine EP Impurity C (CAS 5545-17-5)
- Acetylcysteine Impurity 76 (CAS CATO-C4X-153276)
- Acetylcysteine impurity 74 (CAS CATO-C4X-153274)
- Acetylcysteine Impurity 27 (CAS CATO-C4X-153227)
- Acetylcysteine Impurity 6 (CAS 55748-93-1)
- Acetylcysteine Impurity 13 (CAS CATO-C4X-153213)
- Acetylcysteine Impurity 57 (CAS CATO-C4X-153257)
Recommended Standards
- tert-butyl N-[3-(4-methylimidazol-1-yl)-5-(trifluoromethyl)phenyl]carbamate (CAS 641571-14-4)
- Carbocisteine Impurity 45 (CAS CATO-C4X-201045)
- tert-Butyl (3-(5-Methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)phenyl)carbamate (CAS 641571-19-9)
- (4-Fluorophenyl)(4-(5-(furan-2-yl)-1,3,4-oxadiazol-2-yl)piperidin-1-yl)methanone (CAS 1172346-06-3)
- CAS 1207681-51-3 (CAS 1207681-51-3)
- Bumetanide Impurity 69 (CAS CATO-C4X-198669)
- Eltrombopag Impurity 13 (CAS 376592-58-4)
- 4-Methylumbelliferyl a-D-Galacturonic Acid (CAS 67968-37-0)
- n1-Isopropyl-n1-methylbenzene-1,2-diamine (CAS 28458-66-4)
- Aztreonam Open-Ring Ethyl Ester (CAS CATO-C4X-152227)
- 3,5-Dimethyl-1H-pyrazolo[3,4-b]pyridine (CAS 1449008-19-8)
- Tamoxifen Impurity 30 (CAS CATO-C4X-123330)
- 2-(4-(Difluoromethyl)cyclohex-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2863569-35-9)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
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