1H-pyrazole-4-sulfonamide CAS 27429-59-0
| CAS No. | 27429-59-0 |
| Molecular Formula | C3H9N3O2S |
| Molecular Weight | 151.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1H-pyrazole-4-sulfonamide 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.
CATO supplies 1H-pyrazole-4-sulfonamide (CAS 27429-59-0), a certified reference material (molecular formula C3H9N3O2S, MW 151.19 g/mol) for analytical method development and quality control.
1H-pyrazole-4-sulfonamide (C3H9N3O2S) 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C3H9N3O2S |
| Molecular Weight | 151.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1964 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related H Standards
- 1H-Pyrazole-3,5-dicarboxamide (CAS 1397683-79-2)
- 4H-Pyrazole-3-carboxylic acid, 5-methyl-, ethyl ester (CAS 886495-75-6)
- 1H-Pyrazole-4-sulfonic acid (CAS 438630-65-0)
- 1H-Pyrazole, 5-chloro-4-ethynyl-1,3-dimethyl- (CAS 61514-57-6)
- 1H-pyrazole-3-sulfonamide (CAS 1797158-84-9)
- 1H-Pyrazole-1,5-dicarboxylic acid (CAS 90993-83-2)
- 1H-Pyrazole-3,4-dicarboxylic acid (CAS 31962-35-3)
- 1H-Pyrazole-3,5-dicarboxylic acid (CAS 3112-31-0)
Recommended Standards
- 1H-Imidazo[4,5-b]pyridine-2-thiol (CAS 29448-81-5)
- 1H-Pyrazolo[3,4-b]pyridine-4-thiol (CAS 49834-64-2)
- 1,3-dihydro-2,1-benzothiazol-3-one (CAS 40352-87-2)
- 2-(1H-Imidazol-1-yl)thiazole (CAS 446287-13-4)
- 5-(2-Chlorophenyl)-N-cyclopentylfuran-2-carboxamide (CAS 853330-37-7)
- 2-(2-Benzofuran-2-yl-vinyl)-6-methoxy-benzoic acid methyl ester (CAS 365542-79-6)
- 1-(6-(Thiophen-2-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)ethan-1-amine (CAS 1281956-61-3)
- Gypsogenic Acid (CAS 5143-05-5)
- Levosimendan Impurity 66 (CAS CATO-C4X-130866)
- 4-Oxo-1,4-dihydrothieno[2,3-d]pyrimidine-5-carboxylic acid (CAS 1104926-91-1)
- 2-Methoxy-6-[2-(4-phenyl-4H-[1,2,4]triazol-3-yl)-vinyl]-benzoic acid methyl ester(trans) (CAS 365542-64-9)
- Ethyl 7-amino-2-cyclobutyl[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1379811-62-7)
- 2-(2,3-Dimethylquinoxalin-6-yl)acetic acid (CAS 351872-67-8)
- Semaglutide impurity 251 (CAS CATO-C4X-2226251)
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