(5-Chloro-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl 2-chloroacetate CAS 303148-55-2
| CAS No. | 303148-55-2 |
| Molecular Formula | C8H7Cl2F3N2O2 |
| Molecular Weight | 291.05 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.
(5-Chloro-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl 2-chloroacetate (CAS 303148-55-2), molecular formula C8H7Cl2F3N2O2 and molecular weight 291.05 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H7Cl2F3N2O2, (5-Chloro-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl 2-chloroacetate contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 291.05 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 | C8H7Cl2F3N2O2 |
| Molecular Weight | 291.05 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 6-iodo-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile (CAS 1820648-01-8)
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- 2-(4-Bromo-3-cyano-5-(difluoromethyl)pyridin-2-yl)acetic acid (CAS 1806917-84-9)
- 3-Fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine (CAS 1984826-57-4)
- 6-Thioureidonicotinic acid (CAS 639858-73-4)
- 4-Bromo-3-iodo-5-methyl-1H-indazole (CAS 1427502-42-8)
- (S)-2-Hydroxy-3-(4-nitrophenyl)propanoic acid (CAS 33173-27-2)
- n,2,3,5,6-Pentamethylbenzene-1-sulfonamide (CAS 749916-55-0)
- Iprobenfos (CAS 26087-47-8)
- 5-(4-methylphenyl)-4,5-dihydroisoxazole-3-carboxylic acid (CAS 1018170-48-3)
- Indacaterol Impurity 88 (CAS CATO-C4X-150088)
- 1-[2-[(2R)-4-[2-[3,5-Bis(trifluoromethyl)phenyl]acetyl]-2-(3,4-dichlorophenyl)-2-morpholinyl]ethyl]-alpha,alpha-dimethyl-4-piperidineacetamide (CAS 537034-22-3)
- 1-(2,5-Dichlorophenyl)-N-(2,4-difluorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 338399-12-5)
- Vancomycin Hexapeptide (CAS 115236-65-2)
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