5-(2,4-Dichlorophenoxy)-1-methyl-4-((2,4,5-trichlorophenoxy)methyl)-3-(trifluoromethyl)-1H-pyrazole CAS 318959-28-3
| CAS No. | 318959-28-3 |
| Molecular Formula | C18H10Cl5F3N2O2 |
| Molecular Weight | 520.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-(2,4-Dichlorophenoxy)-1-methyl-4-((2,4,5-trichlorophenoxy)methyl)-3-(trifluoromethyl)-1H-pyrazole.
5-(2,4-Dichlorophenoxy)-1-methyl-4-((2,4,5-trichlorophenoxy)methyl)-3-(trifluoromethyl)-1H-pyrazole (CAS 318959-28-3) is a high-purity analytical reference standard with the molecular formula C18H10Cl5F3N2O2 and a molecular weight of 520.54 g/mol.
The molecular framework of 5-(2,4-Dichlorophenoxy)-1-methyl-4-((2,4,5-trichlorophenoxy)methyl)-3-(trifluoromethyl)-1H-pyrazole (C18H10Cl5F3N2O2) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C18H10Cl5F3N2O2 |
| Molecular Weight | 520.54 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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 | F/Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenoxy Standards
- Methyl 2-(2-(2,4-dichlorophenoxy)acetamido)-5-((2,4-dimethylphenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 505095-51-2)
- Methyl 2-(4-(2,4-dichlorophenoxy)butanamido)-4-methyl-5-(piperidine-1-carbonyl)thiophene-3-carboxylate (CAS 335408-74-7)
- Methyl 2-(2-(2,4-dichlorophenoxy)acetamido)-5-((2-fluorophenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 335408-44-1)
- 2-({5-[3-(2,4-dichlorophenoxy)propyl]-4-phenyl-4H-1,2,4-triazol-3-yl}sulfanyl)-N-(4-fluorophenyl)acetamide (CAS 882749-73-7)
- 5-(2,4-Dichlorophenoxy)-1-methyl-3-(trifluoromethyl)-4-(((3-(trifluoromethyl)phenyl)sulfonyl)methyl)-1H-pyrazole (CAS 318959-29-4)
- Methyl 2-(2-(2,4-dichlorophenoxy)acetamido)-5-((2-ethoxyphenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 335409-01-3)
- Methyl 2-(2-(2,4-dichlorophenoxy)acetamido)-5-((4-ethoxyphenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 505095-40-9)
- 7-[1-(2,4-Dichlorophenoxy)ethyl]-2-{[(2,6-dichlorophenyl)methyl]sulfanyl}-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 338417-70-2)
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