Acetylcysteine Impurity 9 (N,S-Carboxymethyl L-Cysteine HCl) CAS CATO-C4X-15329
| CAS No. | CATO-C4X-15329 |
| Molecular Formula | C7H11NO6S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H11NO6SHCl, Acetylcysteine Impurity 9 (N,S-Carboxymethyl L-Cysteine HCl) contains a carbohydrate-derived structure, an amide group, a sulfone group, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 273.68 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Acetylcysteine Impurity 9 (N,S-Carboxymethyl L-Cysteine HCl) (CAS CATO-C4X-15329), a pharmacopoeial impurity reference standard (molecular formula C7H11NO6SHCl, MW 273.68 g/mol) used for the identification and quantification of trace impurities in APIs.
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 9 (N,S-Carboxymethyl L-Cysteine HCl) 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 | C7H11NO6S HCl |
| Molecular Weight | 273.68 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine Impurity 12 (CAS 1115-65-7)
- Acetylcysteine Impurity 41 (CAS 13100-82-8)
- N-Acetylcysteine-d3 (CAS 131685-11-5)
- Acetylcysteine Impurity 33 (CAS 15058-19-2)
- Acetylcysteine Impurity 37 (CAS 155172-79-5)
- Acetylcysteine Impurity 18 (CAS 1637-71-4)
- Acetylcysteine impurity 66 (CAS 16708-09-1)
- Acetylcysteine EP Impurity D (CAS 18725-37-6)
Recommended Standards
- Dotinurad Impurity 177 (CAS CATO-C4X-2494177)
- Minoxidil Impurity 16 (CAS CATO-C4X-170016)
- (3S,5R)-Atorvastatin EP Impurity B (single configuration) Calcium salt (CAS 887196-25-0)
- (1-((1-Ethyl-1h-pyrazol-4-yl)methyl)cyclopropyl)methanamine (CAS 1466040-93-6)
- N-(4H-1,2,4-triazol-3-yl)-3,4,5,6-tetrahydro-2H-azepin-7-amine (CAS 923255-12-3)
- ethyl 2-(3-cyanophenyl)-2-methylpropanoate (CAS 521068-44-0)
- Dolutegravir Impurity 16 (CAS 2244161-73-5)
- 3,5-Dibromo-4-fluorobenzenesulfonyl chloride (CAS 1806349-89-2)
- methyl 3-[(4-cyanophenyl)sulfanyl]propanoate (CAS 1154018-52-6)
- Neuropeptide Y, porcine (CAS 82785-45-3)
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