4-((2,4-Dichloro-6-nitrophenoxy)methyl)-5-(2,4-dichlorophenoxy)-1-methyl-3-(trifluoromethyl)-1H-pyrazole CAS 318959-26-1
| CAS No. | 318959-26-1 |
| Molecular Formula | C18H10Cl4F3N3O4 |
| Molecular Weight | 531.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-((2,4-Dichloro-6-nitrophenoxy)methyl)-5-(2,4-dichlorophenoxy)-1-methyl-3-(trifluoromethyl)-1H-pyrazole (CAS 318959-26-1) is a high-purity analytical reference standard with the molecular formula C18H10Cl4F3N3O4 and a molecular weight of 531.10 g/mol.
4-((2,4-Dichloro-6-nitrophenoxy)methyl)-5-(2,4-dichlorophenoxy)-1-methyl-3-(trifluoromethyl)-1H-pyrazole (C18H10Cl4F3N3O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine/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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H10Cl4F3N3O4 |
| Molecular Weight | 531.10 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 3 |
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