Acetylcysteine Impurity 33 CAS 15058-19-2
| CAS No. | 15058-19-2 |
| Molecular Formula | C5H6NO2S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Acetylcysteine Impurity 33 is closely related to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Acetylcysteine Impurity 33 (CAS 15058-19-2) is a certified pharmaceutical impurity reference standard with the molecular formula C5H6NO2SNa and a molecular weight of 167.16 g/mol.
Acetylcysteine Impurity 33 (C5H6NO2SNa) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. 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.
CATO manufactures Acetylcysteine Impurity 33 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H6NO2S Na |
| Molecular Weight | 167.16 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1961 |
| 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 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)
- Acetylcysteine Hydrochoride (CAS 18829-79-3)
Recommended Standards
- Fluconazole EP Impurity C (CAS 514222-44-7)
- Topiroxostat Impurity 14 (CAS CATO-C4X-105514)
- Biotin impurity 19 (CAS 23015-53-4)
- 3-Cyclopropyl-1,4-thiazepane 1,1-dioxide hydrochloride (CAS 2138164-22-2)
- 1-(1-Ethynylcyclopropyl)-3-fluorobenzene (CAS 1378824-95-3)
- 2-(((4-Phenoxybutyl)thio)methyl)-1H-benzo[d]imidazole (CAS 867041-76-7)
- 4-Fluoro-3-methyl-5-sulfamoylbenzoic acid (CAS 1344370-87-1)
- N-(1-ethyl-1H-imidazol-2-yl)methanesulfonamide (CAS 1420999-90-1)
- 3-Bromo-N-(3-bromophenyl)benzenesulfonamide (CAS 943334-05-2)
- Semaglutide Impurity 177 (CAS CATO-C4X-2226177)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com