Acetylcysteine impurity 63 CAS CATO-C4X-153263
| CAS No. | CATO-C4X-153263 |
| Molecular Formula | C6H10N2O4S |
| Molecular Weight | 206.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 206.22 g/mol gives Acetylcysteine impurity 63 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Acetylcysteine impurity 63 (CAS CATO-C4X-153263, C6H10N2O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C6H10N2O4S, Acetylcysteine impurity 63 contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 206.22 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.
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.
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 | C6H10N2O4S |
| Molecular Weight | 206.22 g/mol |
| Purity | 97%+ |
| 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 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Acetylcysteine Standards
- Acetylcysteine EP Impurity D (CAS 18725-37-6)
- Acetylcysteine Impurity 47 (CAS 74401-71-1)
- Acetylcysteine Impurity 11 (CAS 79560-92-2)
- Acetylcysteine Impurity 18 (CAS 1637-71-4)
- Acetylcysteine Impurity 37 (CAS 19547-88-7)
- Acetylcysteine Impurity 4 (CAS 210354-22-6)
- Acetylcysteine impurity 66 (CAS 16708-09-1)
- Acetylcysteine Impurity 19 (CAS 2885-79-2)
Recommended Standards
- Vonoprazan Impurity 142 (CAS CATO-C4X-1020142)
- Xanomeline Impurity 16 (CAS CATO-C4X-330116)
- (S)-1-[6-(4-Fluoro-1-pyrazolyl)-3-pyridyl]ethanamine (CAS 1980023-96-8)
- [(3,3,3-Trifluoropropyl)sulfanyl]benzene (CAS 102687-64-9)
- Risdiplam Impurity 8 (CAS 2250441-24-6)
- Ubenimex Impurity 8 (CAS CATO-C4X-18528)
- Clindamycin Impurity 56 (CAS CATO-C4X-134156)
- Fmoc-Lys(4-methoxytrityl)-OPfp (CAS 2022956-36-9)
- 1-((3,5-Dimethyl-1h-pyrazol-4-yl)sulfonyl)indoline hydrochloride (CAS 1032073-17-8)
- 4-Chloro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (CAS 779331-28-1)
- tert-Butyl ((S)-1-((S)-oxiran-2-yl)-2-phenylethyl)carbamate (CAS 286019-82-7)
- Methyl 4-((1,1-dioxidotetrahydrothiophen-3-yl)amino)butanoate hydrochloride (CAS 1245569-32-7)
- rac-(3S,4S)-4-[(1-ethyl-1H-pyrazol-4-yl)oxy]oxolan-3-amine dihydrochloride (CAS 2059910-89-1)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
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