4-(Benzenesulfonyl)-5-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole CAS 318951-72-3
| CAS No. | 318951-72-3 |
| Molecular Formula | C21H14Cl2N2O2S |
| Molecular Weight | 429.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-(Benzenesulfonyl)-5-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole (CAS 318951-72-3), a certified reference material (molecular formula C21H14Cl2N2O2S, MW 429.32 g/mol) for analytical method development and quality control.
Structurally, 4-(Benzenesulfonyl)-5-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole (C21H14Cl2N2O2S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 429.32 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), 4-(Benzenesulfonyl)-5-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole 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 | C21H14Cl2N2O2S |
| Molecular Weight | 429.32 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Benzenesulfonyl Standards
- 2-(Benzenesulfonyl)-4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxy}phenol (CAS 338406-78-3)
- Ethyl 2-({6-[(benzenesulfonyl)methyl]-2-phenylpyrimidin-4-yl}sulfanyl)acetate (CAS 303147-42-4)
- (2E)-2-(Benzenesulfonyl)-3-(4-{[5-(trifluoromethyl)pyridin-2-yl]oxy}phenyl)prop-2-enenitrile (CAS 1025568-00-6)
- 4-(Benzenesulfonyl)-5-(4-chlorophenyl)-1-(2,4-difluorophenyl)-1H-pyrazole (CAS 318951-65-4)
- 3-(Benzenesulfonyl)-4-methyl-2-[(4-methylphenyl)sulfanyl]-6-phenylpyridine (CAS 343372-77-0)
- 4-[(Benzenesulfonyl)methyl]-6-[4-(2-fluorophenyl)piperazin-1-yl]-2-methylpyrimidine (CAS 338960-49-9)
- (2E)-3-[1-(Benzenesulfonyl)-1H-indol-5-yl]-N-(oxan-2-yloxy)prop-2-enamide (CAS 951655-99-5)
- N'-[1-(Benzenesulfonyl)piperidin-4-ylidene]-3,4-dichlorobenzohydrazide (CAS 478248-25-8)
Recommended Standards
- 3-Amino-N-(3,4-dichlorobenzyl)-6-(pyridin-4-yl)thieno[2,3-b]pyridine-2-carboxamide (CAS 445267-48-1)
- Ethyl 5-cyano-6-[(2,4-dichlorophenyl)sulfanyl]-2-phenylpyridine-3-carboxylate (CAS 860784-73-2)
- 3-{4-[(2,4-dichlorophenyl)methoxy]phenyl}-1-(thiophene-2-carbonyl)-1H-pyrazole (CAS 477711-58-3)
- Methyl 2-((4,6-bis(4-chlorophenyl)-3-cyanopyridin-2-yl)thio)acetate (CAS 332385-72-5)
- 5-(3-chloro-4-methylbenzyl)-1,3-thiazol-2-amine (CAS 501349-36-6)
- Propargyl acrylate (CAS 10477-47-1)
- 5-Methoxy-2-(2-(5-nitrofuran-2-yl)vinyl)benzofuran (CAS 89266-51-3)
- 7-Ethoxy-2,2-dimethylchroman-4-one (CAS 76348-94-2)
- 1485XST65B 7789-24-4 Lithium fluoride Lithium fluoride (LiF) EINECS 232-152-0 Fluorolithium HSDB 651 Lithium fluoride (Li3F3) Lithium fluorure [French] Lithium fluorure [French] Lithium monofluoride NSC 12957 NTL 50 TLD 100 TLD 700 Trilithium trifluoride Lithium fluorure UNII-1485XST65B (CAS 7789-24-4)
- (R)-2-(Piperidin-2-yl)ethanol (CAS 68419-38-5)
- N,2-Dihydroxy-6-methylbenzamide (CAS 349392-73-0)
- 3-Methyl-4-oxo-4,5,6,7-tetrahydro-1h-indole-2-carboxylic acid (CAS 6577-89-5)
- 2-Acetyl-5-phenylfuran-3(2H)-one (CAS 56519-19-8)
- Semaglutide impurity 75 (CAS CATO-C4X-222675)
Why CATO?
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