4-Bromo-1-methyl-1H-pyrazole-3-sulfonamide CAS 96564-89-5
| CAS No. | 96564-89-5 |
| Molecular Formula | C4H6BrN3O2S |
| Molecular Weight | 240.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-1-methyl-1H-pyrazole-3-sulfonamide (CAS 96564-89-5), molecular formula C4H6BrN3O2S and molecular weight 240.08 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H6BrN3O2S, 4-Bromo-1-methyl-1H-pyrazole-3-sulfonamide contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 240.08 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C4H6BrN3O2S |
| Molecular Weight | 240.08 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Bromo Standards
- 7-Bromo-2,1,3-benzothiadiazole-4-carbonitrile (CAS 1331742-86-9)
- 5-Bromo-1-methyl-1h-pyrazole-4-sulfonamide (CAS 1334620-45-9)
- 4-bromo-5-nitro-thiophene-2-carbaldehyde (CAS 41498-07-1)
- 5-Bromo-1-methyl-1H-imidazole-4-sulfonamide (CAS 89501-91-7)
- 4-Bromo-6-fluoro-2-methylquinoline (CAS 1070879-47-8)
- 4-Bromo-7-fluoro-2-methylquinoline (CAS 1070879-48-9)
- 3-bromo-8-fluoro-2-methylquinoline (CAS 1259519-95-3)
- 1-(2-Bromo-4-fluorophenyl)cyclopropanecarbonitrile (CAS 1314663-80-3)
Recommended Standards
- 4,4,5,5,6,6,6-Heptafluorohex-2-enoic acid (CAS 356-03-6)
- 4-(2-Iodoethyl)oxane (CAS 4677-16-1)
- 4-Iodo-2,2-dimethyltetrahydro-2H-pyran (CAS 882687-80-1)
- 2H,3H-Perfluorohex-2-enoic acid (CAS 37759-76-5)
- 2-cyclohexyl-N-(1,2,3,4-tetrahydroquinolin-5-yl)acetamide (CAS 1042653-47-3)
- 6-ethyl-1H,2H,3H,4H-thieno[2,3-d]pyrimidine-2,4-dione (CAS 502649-08-3)
- 4-Methyl-7-phenoxy-1h,2h,3h,4h,9h-cyclopenta[b]quinolin-9-one (CAS 374918-94-2)
- N-((4,6-Dichloro-1,3,5-triazin-2-yl)oxy)acetimidamide (CAS 88660-65-5)
- Azacitidine Impurity 87 (CAS CATO-C4X-138887)
- 4-(4-Methoxypyrimidin-2-yl)benzaldehyde (CAS 433920-94-6)
- 2-Amino-5-chloro-4-fluoro-3-methylbenzaldehyde (CAS 1415597-14-6)
- 9575Q08390 938444-93-0 D-106669 UNII-9575Q08390 Urea, N-ethyl-N'-(3-((4-methylphenyl)amino)pyrido(2,3-b)pyrazin-6-yl)- (CAS 938444-93-0)
- 1-(Hexahydro-2,5-methanopentalen-3a(1H)-yl)ethan-1-one (CAS 29844-80-2)
- Des-[Gly]31-Semaglutide (CAS CATO-C4X-2226156)
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