5-Chloro-2-(3-methyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid CAS 6534-34-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 6534-34-5 |
| Molecular Formula | C10H9ClN2O4S |
| Molecular Weight | 288.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Chloro-2-(3-methyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 6534-34-5), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C10H9ClN2O4S. Molecular weight: 288.71 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C10H9ClN2O4S |
| Molecular Weight | 288.71 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 methanol, ethanol, DMSO |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- Methyl ((5-chloro-2-cyanophenyl)sulfonyl)glycinate (CAS 1154278-39-3)
- 3-Chloro-4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 6534-33-4)
- 4-Chloro-3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 88-76-6)
- 7-(2-Chloro-6-fluorophenyl)-5-methyl-6,7-dihydro-1H-1,4-diazepine-2,3-dicarbonitrile (CAS 861209-94-1)
- N-(6-Chloro-5-sulfamoyl-1H-benzo[d]imidazol-2-yl)acetamide (CAS 89725-03-1)
- 2-Chloro-4-(4-fluorophenyl)-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile (CAS 1603054-33-6)
- (3E)-3-[(2-Chloro-6-fluorophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one (CAS 1705584-20-8)
- 2-Chloro-4-(3-fluorophenyl)-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile (CAS 1707391-89-6)
Recommended Standards
- 4-(4-Chlorophenyl)-1-(6-fluoropyridin-2-yl)-1H-pyrazol-3-amine (CAS 318284-44-5)
- Cyclophosphamide impurity 30 (CAS 2924754-60-7)
- 1,4-Dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonyl chloride (CAS 841275-84-1)
- (2-Methoxybenzyl)hydrazine hydrochloride (CAS 179110-14-6)
- (1-Ethylazetidin-3-yl)methanamine (CAS 1412978-07-4)
- tert-Butyl 2-oxospiro[1H-indene-3,4'-piperidine]-1'-carboxylate (CAS 241819-85-2)
- 2-(3-Bromobenzyl)-4,4-dimethyl-4,5-dihydrooxazole (CAS 885266-57-9)
- 2-Bromo-3-chloroisonicotinaldehyde (CAS 1224604-18-5)
- 1-(4-Methyl-4h-1,2,4-triazol-3-yl)propan-2-amine (CAS 1250225-93-4)
- Semaglutide Impurity 139 (CAS CATO-C4X-2226139)
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 13829788188 / jacky.chen@cato-chem.com