3-[2-Chloro-4-(4-chlorophenoxy)phenyl]-1-(4-chlorobenzenesulfonyl)-1H-pyrazole CAS 321522-28-5
| CAS No. | 321522-28-5 |
| Molecular Formula | C21H13Cl3N2O3S |
| Molecular Weight | 479.76 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-[2-Chloro-4-(4-chlorophenoxy)phenyl]-1-(4-chlorobenzenesulfonyl)-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.
3-[2-Chloro-4-(4-chlorophenoxy)phenyl]-1-(4-chlorobenzenesulfonyl)-1H-pyrazole (CAS 321522-28-5) is a high-purity analytical reference standard with the molecular formula C21H13Cl3N2O3S and a molecular weight of 479.76 g/mol.
3-[2-Chloro-4-(4-chlorophenoxy)phenyl]-1-(4-chlorobenzenesulfonyl)-1H-pyrazole (C21H13Cl3N2O3S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C21H13Cl3N2O3S |
| Molecular Weight | 479.76 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 Chloro Standards
- 4-{2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-2-methylhydrazin-1-yl}-6-hydroxy-1-[3-(trifluoromethyl)phenyl]-1,2-dihydropyrimidin-2-one (CAS 866051-56-1)
- N-[(4-Chloro-1,3-dimethyl-1H-pyrazolo[3,4-b]pyridin-5-yl)carbonyl]-N'-[3,5-di(trifluoromethyl)phenyl]urea (CAS 650615-81-9)
- 1-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]-N'-[(1E)-(2,4-dichlorophenyl)methylidene]piperidine-4-carbohydrazide (CAS 338761-24-3)
- 2-((4-Chloro-N-(2,4-dichloro-5-isopropoxyphenyl)phenyl)sulfonamido)-N,N-dimethylacetamide (CAS 338967-44-5)
- Ethyl 2-{3-[(4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxy}phenyl)carbamoyl]pyridin-2-yl}acetate (CAS 338392-15-7)
- N-(4-chloro-2-(trifluoromethyl)phenyl)-1-(2,4-dichloro-5-methoxyphenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 339015-17-7)
- 3-Chloro-2-(3-(1-(phenylsulfonyl)-1H-pyrazol-3-yl)phenoxy)-5-(trifluoromethyl)pyridine (CAS 321385-86-8)
- N-(2-(4-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-1-yl)pyridin-3-yl)-4-fluorobenzamide (CAS 478262-13-4)
Recommended Standards
- 2-(4-Chlorobenzoyl)-3-[(2,4-dichlorobenzenesulfonyl)methyl]-1-benzofuran (CAS 338411-58-8)
- Tert-butyl ((1R,3S)-3-((5-chloro-4-iodopyridin-2-yl)carbamoyl)cyclohexyl)carbamate (CAS 2057506-94-0)
- 9-((2R,4S,5R)-4-((tert-Butyldimethylsilyl)oxy)-5-(((tert-butyldimethylsilyl)oxy)methyl)tetrahydrofuran-2-yl)-9H-purin-6-amine (CAS 51549-32-7)
- N'-[2-(4-Chlorophenoxy)ethanimidoyl]-4-(2,4-dichlorobenzoyl)-1-methyl-1H-pyrrole-2-carbohydrazide (CAS 338418-86-3)
- (4-Bromo-1H-pyrazol-1-yl)(phenyl)methanone (CAS 116228-39-8)
- Mecarbam (CAS 2595-54-2)
- Zinc(II) Propane-1-sulfinate (CAS 24308-93-8)
- cis-Permethrin EP Impurity G (CAS 85576-82-5)
- (2Z)-2-[(4-Methylphenyl)methylidene]-2,3,4,9-tetrahydro-1H-carbazol-1-one (CAS 1164469-52-6)
- 2,6-diazaspiro[3.4]octan-5-one;hydrochloride (CAS 1203683-28-6)
- 2,7-Naphthyridine-4-carbaldehyde (CAS 10273-40-2)
- 4-Chloro-2-(difluoromethyl)-5-(trifluoromethyl)nicotinaldehyde (CAS 1805369-60-1)
- 2-((1,3-Dimethyl-1H-pyrazol-4-yl)methylene)malononitrile (CAS 514220-43-0)
- Tripeptide-10 citrulline (CAS 960531-53-7)
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