2-(4-Chlorophenyl)-4-(4-fluorophenyl)-5-(pyridin-4-yl)-1,2-dihydro-3H-pyrazol-3-one CAS 219138-24-6
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 219138-24-6 |
| Molecular Formula | C20H13ClFN3O |
| Molecular Weight | 365.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(4-Chlorophenyl)-4-(4-fluorophenyl)-5-(pyridin-4-yl)-1,2-dihydro-3H-pyrazol-3-one (CAS 219138-24-6) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C20H13ClFN3O. Molecular weight: 365.79 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C20H13ClFN3O |
| Molecular Weight | 365.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2019 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 3 |
Related Chlorophenyl Standards
- N-(3-(4-chlorophenyl)imidazo[1,2-a]pyridin-8-yl)-2-fluorobenzamide (CAS 439096-62-5)
- 2-(4-(3-Chlorophenyl)piperazin-1-yl)-N-(2,4-difluorophenyl)acetamide (CAS 477320-17-5)
- 2-(4-(3-Chlorophenyl)piperazin-1-yl)-N-(2,5-difluorophenyl)acetamide (CAS 303091-78-3)
- 2-(4-(3-Chlorophenyl)piperazin-1-yl)-N-(3,4-difluorophenyl)acetamide (CAS 303091-74-9)
- 5-(4-Chlorophenyl)-3-(3,4-dimethoxyphenyl)pyrazolo[1,5-a]pyrimidine (CAS 866144-81-2)
- N-(4-(4-Chlorophenyl)thiazol-2-yl)-5-nitrothiophene-2-carboxamide (CAS 324758-78-3)
- 4-{[(E)-2-[3-(2-chlorophenyl)-4-cyano-1,2-oxazol-5-yl]ethenyl]amino}benzoic acid (CAS 320424-92-8)
- 6-(2-Chlorophenyl)-4-imino-3-phenyl-1H,2H,3H,4H,7H,8H-[1,3]diazino[5,4-d]pyrimidine-2,8-dione (CAS 866019-01-4)
Recommended Standards
- 1-(4-Methylbenzyl)-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-6-sulfonyl chloride (CAS 1334147-61-3)
- 3-(4-Fluorophenyl)-1H-pyrazole-4-carbaldehyde N-(7-chloro-4-quinolinyl)hydrazone (CAS 477711-39-0)
- 1-Benzyl-3-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-6-sulfonyl chloride (CAS 1334147-57-7)
- N-(5-Chloro-2-methoxyphenyl)-2-(10-(4-(2-hydroxyethyl)piperazine-1-carbonyl)-3,4-dihydrobenzo[b][1,6]naphthyridin-2(1H)-yl)acetamide (CAS 1228168-54-4)
- Ethyl 3-cyano-4-fluorobenzoate (CAS 773136-57-5)
- 6-Bromo-2-chloro-4-methylquinazoline (CAS 175724-46-6)
- Tert-butyl 9-amino-1-fluoro-3-azaspiro[5.5]Undecane-3-carboxylate (CAS 2306265-54-1)
- 1-(4-Chloro-3,5-difluorophenyl)-2,2,2-trifluoroethanone (CAS 1256467-08-9)
- 5-Methylpyrrolidine-3-carboxylic acid (CAS 89531-40-8)
- Tau Peptide (401-411)-Lys-Lys trifluoroacetate salt (CAS 2022956-59-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com