Acetylcysteine Impurity 47 CAS 74401-71-1
| CAS No. | 74401-71-1 |
| Molecular Formula | C7H11NO4S |
| Molecular Weight | 205.23 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.
Acetylcysteine Impurity 47 (CAS 74401-71-1) is a certified pharmaceutical impurity reference standard with the molecular formula C7H11NO4S and a molecular weight of 205.23 g/mol.
Acetylcysteine Impurity 47 (C7H11NO4S) contains an amide group, a sulfone group, a carboxylic acid 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.
As a certified reference material (CRM), Acetylcysteine Impurity 47 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 | C7H11NO4S |
| Molecular Weight | 205.23 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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 |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine EP Impurity D (CAS 18725-37-6)
- Acetylcysteine impurity 63 (CAS CATO-C4X-153263)
- Acetylcysteine Impurity 18 (CAS 1637-71-4)
- Acetylcysteine Impurity 11 (CAS 79560-92-2)
- Acetylcysteine Impurity 37 (CAS 19547-88-7)
- Acetylcysteine impurity 66 (CAS 16708-09-1)
- Acetylcysteine Impurity 4 (CAS 210354-22-6)
- Acetylcysteine Impurity 19 (CAS 2885-79-2)
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