3-(4-Chlorophenyl)pyrazole CAS 59843-58-2
| CAS No. | 59843-58-2 |
| Molecular Formula | C9H7ClN2 |
| Molecular Weight | 178.62 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.
CATO supplies 3-(4-Chlorophenyl)pyrazole (CAS 59843-58-2), a certified reference material (molecular formula C9H7ClN2, MW 178.62 g/mol) for analytical method development and quality control.
The molecular framework of 3-(4-Chlorophenyl)pyrazole (C9H7ClN2) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 3-(4-Chlorophenyl)pyrazole meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H7ClN2 |
| Molecular Weight | 178.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chlorophenyl Standards
- 4-(4-Chlorophenyl)-1H-pyrazole (CAS 111016-47-8)
- 4-(3-Chlorophenyl)-1h-pyrazole (CAS 1196152-63-2)
- 1-(2-Chlorophenyl)-1H-imidazole (CAS 51581-50-1)
- 1-(2-Chlorophenyl)-1H-pyrazole (CAS 917508-36-2)
- 1-(3-Chlorophenyl)pyrazole (CAS 57211-65-1)
- 1-(4-Chlorophenyl)-1H-pyrazole (CAS 25419-86-7)
- 2-(2-Chlorophenyl)imidazole (CAS 76875-22-4)
- 2-(3-Chlorophenyl)imidazole (CAS 27423-81-0)
Recommended Standards
- 3-(2-Chloropropanoyl)-1-ethylurea (CAS 554426-65-2)
- 3-amino-3-(4-chlorophenyl)prop-2-enenitrile (CAS 25354-58-9)
- 3-(2-Chloroacetyl)-1-propylurea (CAS 4791-26-8)
- 3-Amino-4-chloroquinoline (CAS 58401-43-7)
- 2-Hydroxy-2-[[3-(phenylmethoxy)phenyl]methylene] Hydrazide Benzoic Acid (CAS 316131-42-7)
- Methyl 6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carboxylate (CAS 188780-24-7)
- 4-Chloro-3-(N-(2,5-dimethylphenyl)sulfamoyl)-N-(pyridin-2-ylmethyl)benzamide (CAS 827013-98-9)
- 1-Methyl-2-(1-methyl-1h-pyrazol-4-yl)-6-oxopiperidine-3-carboxamide (CAS 1315366-28-9)
- Ethyl 5-(4-fluorophenoxy)-1,3,4-thiadiazole-2-carboxylate (CAS 1499368-76-1)
- 1-Propanone, 1-(5-chloro-2-pyridinyl)-2-methyl- (CAS 144505-67-9)
- 2-(4-(Bromomethyl)-3-(difluoromethyl)-5-fluoropyridin-2-yl)acetic acid (CAS 1805998-79-1)
- 2-Amino-3-(4-chloro-3-methylphenyl)propanoic acid (CAS 1259997-14-2)
- Ethyl(2,4,4-trimethylpentan-2-yl)amine (CAS 78491-85-7)
- Des-Gln19-Tirzepatide (CAS CATO-CPTD788954)
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