1-(3,4-Dichlorophenyl)-4-(2-methoxyphenyl)-3-methyl-1H-pyrazole CAS 956705-28-5
| CAS No. | 956705-28-5 |
| Molecular Formula | C17H14Cl2N2O |
| Molecular Weight | 333.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1-(3,4-Dichlorophenyl)-4-(2-methoxyphenyl)-3-methyl-1H-pyrazole (CAS 956705-28-5), molecular formula C17H14Cl2N2O and molecular weight 333.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C17H14Cl2N2O, 1-(3,4-Dichlorophenyl)-4-(2-methoxyphenyl)-3-methyl-1H-pyrazole contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 333.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C17H14Cl2N2O |
| Molecular Weight | 333.21 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenyl Standards
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Recommended Standards
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- (S)-3-(1-Aminoethyl)-4,8-dichloro-2-phenylisoquinolin-1(2H)-one (CAS 2055766-86-2)
- 1,3-Difluoro-2-(2-methyl-3-nitrophenoxy)-5-(trifluoromethyl)benzene (CAS 2244083-49-4)
- 5-Bromo-N-(pentan-2-yl)nicotinamide (CAS 1057435-67-2)
- Methyl 2-amino-5-(1-phenylethyl)thiophene-3-carboxylate (CAS 884497-36-3)
- 7-bromo-6,8-difluoro-quinazolin-4-ol (CAS 1698027-87-0)
- N-(3-Chloro-2-methylpropyl)aniline (CAS 2275-64-1)
- 3-Methyl-5-oxo-5-(4-phenoxyphenyl)pentanoic acid (CAS 64157-56-8)
- (4-Chloro-1-ethyl-1h-pyrazol-5-yl)methanol (CAS 1310379-48-6)
- N-Benzyl 3-Aminobenzenesulfonamide (CAS 303780-52-1)
- 1,2-dihydroacenaphthylenamine hydrochloride (CAS 58306-99-3)
- N-[2-(4-Methylpiperazino)-5-(trifluoromethyl)phenyl]-N-phenylurea (CAS 514199-72-5)
- Semaglutide impurity 36 (CAS CATO-C4X-222636)
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