5-(4-Chlorophenyl)-4-(phenylsulfonyl)-1-(2,3,4-trichlorophenyl)-1H-pyrazole CAS 318951-62-1
| CAS No. | 318951-62-1 |
| Molecular Formula | C21H12Cl4N2O2S |
| Molecular Weight | 498.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-(4-Chlorophenyl)-4-(phenylsulfonyl)-1-(2,3,4-trichlorophenyl)-1H-pyrazole (CAS 318951-62-1), a certified reference material (molecular formula C21H12Cl4N2O2S, MW 498.21 g/mol) for analytical method development and quality control.
The molecular framework of 5-(4-Chlorophenyl)-4-(phenylsulfonyl)-1-(2,3,4-trichlorophenyl)-1H-pyrazole (C21H12Cl4N2O2S) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
CATO manufactures 5-(4-Chlorophenyl)-4-(phenylsulfonyl)-1-(2,3,4-trichlorophenyl)-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H12Cl4N2O2S |
| Molecular Weight | 498.21 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 |
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Recommended Standards
- Ni-(S)-BPB-GLy (CAS 96293-19-5)
- 2-((4-Allyl-5-(2-bromophenyl)-4H-1,2,4-triazol-3-yl)thio)-N-(2,3-dichlorophenyl)acetamide (CAS 332912-99-9)
- [N-[Phenyl[2-[[[(1S,2R)-1-(phenylmethyl)-2-pyrrolidinyl-κN]carbonyl]amino-κN]phenyl]methylene]glycinato(2-)-κN,κO]nickel (CAS 172924-51-5)
- 2-((4-Allyl-5-(2-bromophenyl)-4H-1,2,4-triazol-3-yl)thio)-N-(2,5-dichlorophenyl)acetamide (CAS 332912-93-3)
- Solabegron (CAS 252920-94-8)
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- Dibutylamine hydrobromide (CAS 10435-44-6)
- (S)-tert-Butyl 1-(3-fluorobenzoyl)pyrrolidin-3-ylcarbamate (CAS 1286207-75-7)
- 1-(3-Chlorophenyl)-5-(pyridin-4-yl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1017402-25-3)
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- 2-Bromo-4-chloro-5-fluorobenzeneacetic acid (CAS 1067882-59-0)
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