5-(3,4-Dichlorophenyl)-4-(methylsulfonyl)-1-(2,4,6-trichlorophenyl)-1H-pyrazole CAS 321574-34-9
| CAS No. | 321574-34-9 |
| Molecular Formula | C16H9Cl5N2O2S |
| Molecular Weight | 470.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(3,4-Dichlorophenyl)-4-(methylsulfonyl)-1-(2,4,6-trichlorophenyl)-1H-pyrazole (CAS 321574-34-9), molecular formula C16H9Cl5N2O2S and molecular weight 470.58 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 5-(3,4-Dichlorophenyl)-4-(methylsulfonyl)-1-(2,4,6-trichlorophenyl)-1H-pyrazole is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 470.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-(3,4-Dichlorophenyl)-4-(methylsulfonyl)-1-(2,4,6-trichlorophenyl)-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 | C16H9Cl5N2O2S |
| Molecular Weight | 470.58 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) | 11.0 |
| 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 Dichlorophenyl Standards
- 5-(3,4-Dichlorophenyl)-4-(methylsulfonyl)-1-(2,3,4-trichlorophenyl)-1H-pyrazole (CAS 400088-12-2)
- N-(2,4-Dichlorophenyl)-2-((5-(pyridin-4-yl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 477318-67-5)
- N-(2,6-Dichlorophenyl)-2-((5-(pyridin-4-yl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 477318-71-1)
- 4-[(Z)-2-(2,4-Dichlorophenyl)ethenyl]-2-(3-fluoro-4-iodophenyl)pyrimidine (CAS 477870-85-2)
- 5-(2,4-Dichlorophenyl)-3-(1,3-dioxo-2,3-dihydro-1H-inden-2-ylidene)-4,6-dioxo-octahydropyrrolo[3,4-c]pyrrole-1-carboxylic acid (CAS 321521-99-7)
- 5-(3,4-Dichlorophenyl)-4-(3-fluoro-4-methylbenzoyl)-3-hydroxy-1-(pyridin-3-ylmethyl)-1H-pyrrol-2(5H)-one (CAS 618076-11-2)
- N-(3,4-Dichlorophenyl)-2-((5-(4-hydroxyphenyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 332881-74-0)
- 7-(3,4-Dichlorophenyl)-2-[4-(3-methylphenyl)piperazin-1-yl]-3H,4H-thieno[3,2-d]pyrimidin-4-one (CAS 1251646-25-9)
Recommended Standards
- Methyl 2-((5,6-dimethyl-2H-pyran-2-yl)(ethoxy)amino)-5-((2,4-dimethylphenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 505095-89-6)
- 3-[3,5-bis(trifluoromethyl)phenyl]-N'-({[(1,2,2-trichlorovinyl)amino]carbonyl}oxy)prop-2-enimidamide (CAS 646989-54-0)
- 3-Diethoxyphosphoryloxy-7,11,15-trimethyl-hexadecatetra-2,6,10,14-enoic Acid, Ethyl Ester, (Mixture of Isomers) 3-[(Diethoxyphosphinyl)oxy]-7,11,15-trimethyl-2,6,10,14-hexadecatetraenoic Acid Ethyl Ester 887354-51-0 (CAS 887354-51-0)
- (Z)-(1-(3,3-Dimethyl-1-phenylbut-1-en-1-yl)naphthalen-2-yl)diphenylphosphine (CAS 2862827-57-2)
- 2-(2,3-Dihydrobenzofuran-5-yl)ethyl 4-methylbenzenesulfonate (CAS 79679-49-5)
- 1-(2,4-Dimethylphenyl)butane-1,3-dione (CAS 56290-42-7)
- (2S,5S)-Ethyl 5-hydroxytetrahydrofuran-2-carboxylate (CAS 147058-43-3)
- 3-(4-Chloro-3-nitrophenyl)-1,1-diisopropylurea (CAS 1980053-66-4)
- 5-fluoro-1-phenyl-1H-pyrazole-4-sulfonyl chloride (CAS 1700033-95-9)
- 44873-49-6 Boranamine, 1,1-dichloro-N,N-bis(1-methylethyl)- CTK1D2316 (CAS 44873-49-6)
- (2-Ethyl-1-piperidinyl)(2-pyrrolidinyl)methanonehydrochloride (CAS 1236261-88-3)
- Methyl 4,5-dibromothiophene-3-carboxylate (CAS 24647-83-4)
- 1-(3-Chlorophenyl)-2-(triphenylphosphoranylidene)ethanone (CAS 56893-07-3)
- Semaglutide impurity 211 (CAS CATO-C4X-2226211)
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