1-(2-Chlorophenyl)-5-methyl-1H-pyrazole-4-sulfonamide CAS 1291749-03-5
| CAS No. | 1291749-03-5 |
| Molecular Formula | C10H10ClN3O2S |
| Molecular Weight | 271.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1-(2-Chlorophenyl)-5-methyl-1H-pyrazole-4-sulfonamide (CAS 1291749-03-5) is a high-purity analytical reference standard with the molecular formula C10H10ClN3O2S and a molecular weight of 271.72 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 1-(2-Chlorophenyl)-5-methyl-1H-pyrazole-4-sulfonamide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 271.72 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 1-(2-Chlorophenyl)-5-methyl-1H-pyrazole-4-sulfonamide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C10H10ClN3O2S |
| Molecular Weight | 271.72 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Chlorophenyl Standards
- 3-[(4-chlorophenyl)carbonyl]-1,3-thiazolidine-4-carboxylic acid (CAS 1042437-09-1)
- 3-(4-Chlorophenyl)-1-methyl-5-(methylsulfonyl)-1H-1,2,4-triazole (CAS 154106-11-3)
- (E)-2-((4-chlorophenyl)sulfonyl)-3-ethoxyacrylonitrile (CAS 32083-27-5)
- 3-(4-Chlorophenyl)-5-(ethylsulfonyl)-1H-1,2,4-triazole (CAS 924663-91-2)
- 7-[(Z)-2-(4-Chlorophenyl)ethenyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine (CAS 303145-72-4)
- N-(2-chlorophenyl)-4-(1H-pyrrol-1-yl)-1,3,5-triazin-2-amine (CAS 438249-81-1)
- 1-[2-(4-Chlorophenyl)ethyl]-1H-1,3-benzodiazol-5-amine (CAS 1493318-64-1)
- (2-Chlorophenyl)(3,4-dihydroquinolin-1(2H)-yl)methanone (CAS 329058-15-3)
Recommended Standards
- 2-Methyl-5-(3-methylisoxazol-5-yl)benzene-1-sulfonyl chloride (CAS 1284186-31-7)
- 1-(4-Chlorobenzyl)-1H-pyrazole-4-sulfonamide (CAS 1341915-89-6)
- 2-Methyl-5-(2-methyloxazol-5-yl)benzene-1-sulfonyl chloride (CAS 1268334-77-5)
- 2-Chloro-N-((methylcarbamoyl)carbamothioyl)benzamide (CAS 138712-72-8)
- Methyl 2-bromo-2-(2-chloro-4-fluorophenyl)acetate (CAS 1389326-19-5)
- 4-(trifluoromethoxy)-N’-{[2-(trifluoromethyl)phenyl]methyl}benzene-1-carboximidamide hydrochloride (CAS 546114-56-1)
- 2-(5-((4-(Ethoxycarbonyl)phenyl)diazenyl)-2-hydroxyphenyl)acetic acid (CAS 78028-01-0)
- n-(1-(4-Bromophenyl)ethyl)acetamide (CAS 92520-16-6)
- 3-Methoxy-6,7,8,9-tetrahydro-5H-pyrido[4,3-c]azepine (CAS 1393552-15-2)
- (E)-3-(dimethylamino)-1-(1H-indol-3-yl)prop-2-en-1-one (CAS 954421-13-7)
- 6-(tert-Butyl)-3-cyclopropoxy-N,N-dimethylpyridin-2-amine (CAS 1243451-53-7)
- Methyl 4-bromo-2-cyano-6-(difluoromethyl)benzoate (CAS 1807213-07-5)
- n,n,3-Triethylpiperidine-3-carboxamide (CAS 1339409-67-4)
- 3X Flag Peptide trifluoroacetate salt (CAS 402750-12-3)
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