1-(4-Bromobenzenesulfonyl)-3-cyclopropyl-1H-pyrazole CAS 956977-35-8
| CAS No. | 956977-35-8 |
| Molecular Formula | C12H11BrN2O2S |
| Molecular Weight | 327.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-(4-Bromobenzenesulfonyl)-3-cyclopropyl-1H-pyrazole (CAS 956977-35-8), a certified reference material (molecular formula C12H11BrN2O2S, MW 327.20 g/mol) for analytical method development and quality control.
Based on its molecular formula C12H11BrN2O2S, 1-(4-Bromobenzenesulfonyl)-3-cyclopropyl-1H-pyrazole contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 327.20 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).
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 | C12H11BrN2O2S |
| Molecular Weight | 327.20 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 | 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Bromobenzenesulfonyl Standards
- 1-(4-Bromobenzenesulfonyl)cyclopentane-1-carboxylic acid (CAS 875157-48-5)
- 4-(4-Bromobenzenesulfonyl)piperazine-1-carbaldehyde (CAS 928888-65-7)
- 2-(4-Bromobenzenesulfonyl)-3-methylbutanoic acid (CAS 134649-66-4)
- Methyl 4-(4-bromobenzenesulfonyl)butanoate (CAS 163496-41-1)
- 1-[2-(4-bromobenzenesulfonyl)ethyl]piperazine (CAS 1094558-34-5)
- 1-(4-Bromobenzenesulfonyl)pyrrolidine-2-carboxylic acid (CAS 251097-16-2)
- 1-(3-Bromobenzenesulfonyl)-3-methoxypyrrolidine (CAS 1967972-44-6)
- 5-(4-Bromobenzenesulfonyl)-4-methyl-1,2,3-thiadiazole (CAS 338978-76-0)
Recommended Standards
- (4-((2,4-Dichlorobenzyl)oxy)-3-ethoxyphenyl)methanol (CAS 401827-46-1)
- 2-Amino-5-(2-bromo-5-ethoxybenzylidene)thiazol-4(5H)-one (CAS 430464-20-3)
- (R)-tert-Butyl (1-iodo-4-methylpentan-2-yl)carbamate (CAS 1932490-91-9)
- 2-Amino-N-(3-bromophenyl)benzenesulfonamide (CAS 62533-15-7)
- 8-(Allyloxy)indolizine-7-carboxylic acid (CAS 1706464-77-8)
- 1-Nitro-2-dichloromethyl-4-(pentafluorosulfanyl)benzene (CAS 1309569-30-9)
- 3-Hydroxy-N,N-dimethyl-4-(methylsulfonamido)benzamide (CAS 1243458-47-0)
- 2-Methyl-3-(methylsulfonyl)-1H-pyrrole (CAS 1707571-37-6)
- (E)-3-[4-(dimethylamino)anilino]-2-(1H-1,2,3,4-tetraazol-5-yl)-2-propenenitrile (CAS 946386-76-1)
- (S)-tert-Butyl (4-(3-chloro-2-(phenylcarbamoyl)phenyl)-3-oxobutan-2-yl)carbamate (CAS 1386861-47-7)
- ({2-[(4-methylphenyl)sulfanyl]ethyl}carbamoyl)methyl 4-hydroxybenzoate (CAS 879320-34-0)
- 1-(2-Chloro-5-hydroxypyridin-4-yl)ethanone (CAS 1196153-84-0)
- 5-Methoxy-6-methyl-1H-indazole-3-carboxylic acid (CAS 1956377-65-3)
- Insulin Degludec Impurity 9 (CAS CATO-C4X-21579)
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