4-(3-Chloro-4-fluorophenyl)-1,2-dimethyl-5-(quinoxalin-6-yl)-1,2-dihydro-3H-pyrazol-3-one CAS 937279-03-3
| CAS No. | 937279-03-3 |
| Molecular Formula | C19H14ClFN4O |
| Molecular Weight | 368.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(3-Chloro-4-fluorophenyl)-1,2-dimethyl-5-(quinoxalin-6-yl)-1,2-dihydro-3H-pyrazol-3-one is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-(3-Chloro-4-fluorophenyl)-1,2-dimethyl-5-(quinoxalin-6-yl)-1,2-dihydro-3H-pyrazol-3-one (CAS 937279-03-3), molecular formula C19H14ClFN4O and molecular weight 368.79 g/mol, is a CATO reference standard with documented purity and traceability.
4-(3-Chloro-4-fluorophenyl)-1,2-dimethyl-5-(quinoxalin-6-yl)-1,2-dihydro-3H-pyrazol-3-one (C19H14ClFN4O) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. Halogen substitution raises its density and boiling point; 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.
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.
CATO manufactures 4-(3-Chloro-4-fluorophenyl)-1,2-dimethyl-5-(quinoxalin-6-yl)-1,2-dihydro-3H-pyrazol-3-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H14ClFN4O |
| Molecular Weight | 368.79 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 4 |
Related Chloro Standards
- Methyl 2-chloro-2-(triphenylphosphoranylidene)acetate (CAS 31459-98-0)
- N-[4-Chloro-2-(trifluoromethyl)phenyl]-2-(2-mercapto-4-oxo-4,5-dihydro-1,3-thiazol-5-yl)acetamide (CAS 1142200-50-7)
- N-[2-Chloro-5-(trifluoromethyl)phenyl]-2-(2-mercapto-4-oxo-4,5-dihydro-1,3-thiazol-5-yl)acetamide (CAS 1142200-52-9)
- 4,4'-((5-Chloro-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methylene)dimorpholine (CAS 956754-27-1)
- 1-((2-Chloro-4-fluorophenyl)amino)-1-oxopropan-2-yl 2-(methylthio)nicotinate (CAS 851282-87-6)
- 6-Chloro-3-(4-phenylpiperazine-1-carbonyl)-2H-chromen-2-one (CAS 923220-67-1)
- 4-(2-Chloro-5-nitrobenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid (CAS 1326809-34-0)
- 4-(4-Chloro-3-nitrobenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid (CAS 1326813-84-6)
Recommended Standards
- 2-[[[4-(Acetylamino)phenyl]sulfonyl]amino]-4-chlorobenzoic acid (CAS 851109-36-9)
- Methyl 1-(4-chlorophenyl)-4-((2-methoxy-2-oxoethyl)thio)-6-oxo-1,6-dihydropyridazine-3-carboxylate (CAS 882747-38-8)
- (S)-2-(4-Nitrophenylsulfonamido)-3-phenylpropanoyl chloride (CAS 146815-23-8)
- n-(2-(5-(Benzo[d][1,3]dioxol-5-ylmethylene)-2,4-dioxothiazolidin-3-yl)ethyl)-2-chloroacetamide (CAS 554423-46-0)
- 8-Benzyl-4-(2-methoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid (CAS 1326808-86-9)
- 6-Ethyl-3-methylbenzofuran (CAS 71507-43-2)
- 5-Chloro-N-ethyl-N-methyl-4-(methylamino)pyridine-3-sulfonamide (CAS 1352515-10-6)
- 3-Azepan-2-ylmethyl-benzo[b]thiophene-2-carboxylic acid(2-hydroxy-ethyl)-amide hydrochloride (CAS 1361112-86-8)
- 6-(2-Methoxyethoxy)benzofuran-2-carboxylic acid (CAS 1352541-67-3)
- 7-(1H-pyrrol-1-yl)-2,4-bis(trifluoromethyl)-1,8-naphthyridine (CAS 338412-21-8)
- 3,3-Difluoropropanenitrile (CAS 10353-60-3)
- Ethyl 5-methoxyimidazo[1,2-a]quinoline-2-carboxylate (CAS 66491-09-6)
- 3-Ethoxy-6-methoxybenzo[d]isoxazole (CAS 439085-75-3)
- Neuropeptide EI (human, mouse, rat) (CAS 125934-45-4)
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 18665070610 / Nicole.chen@cato-chem.com