Carbocisteine Impurity N1 CAS 31898-75-6
| CAS No. | 31898-75-6 |
| Molecular Formula | C5H7NO3S |
| Molecular Weight | 161.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Carbocisteine Impurity N1 (CAS 31898-75-6) is a certified pharmaceutical impurity reference standard with the molecular formula C5H7NO3S and a molecular weight of 161.18 g/mol.
Based on its molecular formula C5H7NO3S, Carbocisteine Impurity N1 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 161.18 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.
Physical & Chemical Properties
| Molecular Formula | C5H7NO3S |
| Molecular Weight | 161.18 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 |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Carbocisteine Standards
- Carbocisteine Impurity 19 (CAS 14226-97-2)
- Carbocisteine Impurity 46 (CAS CATO-C4X-201046)
- Carbocisteine Impurity 3 (CAS 88620-38-6)
- Carbocisteine Impurity 9 (CAS 87862-95-1)
- Carbocisteine S-Isomer (CAS 50698-76-5)
- Carbocisteine Impurity 13 (CAS 21301-10-0)
- Carbocisteine Impurity 62 (CAS CATO-C4X-201062)
- Carbocisteine-13C3 (CAS 1391068-19-1)
Recommended Standards
- Benzo[d][1,2,3]thiadiazole-5-carbonitrile (CAS 23616-13-9)
- N,1-Dimethyl-1-oxo-1phosphinan-4-amine (CAS 2711976-41-7)
- Benzo[c][1,2,5]thiadiazole-4-carbonitrile (CAS 54554-45-9)
- n-Methyl-1h-imidazole-4-sulfonamide (CAS 58768-15-3)
- LCZ-696 Impurity 34 (CAS 149690-12-0;752174-62-2（free base）)
- Azithromycin impurity 55 (CAS 944124-75-8)
- Desmopressin EP Impurity C (CAS CATO-C4X-221525)
- 2,3-Difluoro-5-hydroxybenzaldehyde (CAS 1806330-39-1)
- (2-((1,4-Dioxa-8-azaspiro[4.5]Decan-8-yl)methyl)phenyl)(4-bromo-3-fluorophenyl)methanone (CAS 898756-17-7)
- Iodomethyl acetate (CAS 13398-11-3)
- 5-Bromo-1-ethyl-2-iodo-1H-indole (CAS 2127095-50-3)
- Methoxytris(pentafluorophenyl)silane (CAS 223668-78-8)
- 1-(1H-benzo[d][1,2,3]triazol-1-yl)propan-2-one (CAS 64882-50-4)
- (Tyr?)-C-Peptide (human) (CAS 57327-90-9)
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