4-Chloro-1-phenyl-1H-pyrazole CAS 6831-92-1
| CAS No. | 6831-92-1 |
| Molecular Formula | C9H7ClN2 |
| Molecular Weight | 178.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution, 4-Chloro-1-phenyl-1H-pyrazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 178.62 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 4-Chloro-1-phenyl-1H-pyrazole (CAS 6831-92-1), a certified reference material (molecular formula C9H7ClN2, MW 178.62 g/mol) for analytical method development and quality control.
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.
As a certified reference material (CRM), 4-Chloro-1-phenyl-1H-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 | >95% |
| 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.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 5-chloro-2-methyl-1,6-naphthyridine (CAS 1001754-84-2)
- 3-Chloro-6,7-dihydro-5H-cyclopenta[c]pyridine-4-carbonitrile (CAS 103589-67-9)
- 5-Chloro-1-phenyl-1H-imidazole (CAS 104672-26-6)
- 2-Chloro-3-methyl-1,5-naphthyridine (CAS 1049030-27-4)
- 6-Chloro-3-quinolinamine (CAS 1051372-60-1)
- 6-Chloro-4-methylquinazoline (CAS 1071752-93-6)
- 2-Chloro-3-methyl-1,7-naphthyridine (CAS 1105191-93-2)
- 5-Chloro-1-phenyl-1H-pyrazole (CAS 1127-84-0)
Recommended Standards
- 4-Amino-2-chloroquinoline (CAS 80947-25-7)
- 4-Chloro-2-methyl-[1,7]naphthyridine (CAS 61319-98-0)
- 4-(3-Chlorophenyl)-1H-imidazole (CAS 912763-45-2)
- 4-Chloro-2-methyl-1,5-naphthyridine (CAS 61319-97-9)
- Ethyl 2,2-Dichloro-3-oxobutanoate (CAS 6134-66-3)
- (3-methoxyphenyl)magnesium bromide 3-Methoxyphenylmagnesium bromide 36282-40-3 (CAS 36282-40-3)
- 1-Chloro-3,5-difluoro-2-methylbenzene (CAS 1261488-03-2)
- 3-((2-(4-(Dimethylamino)phenyl)quinolin-6-yl)oxy)-2-((tetrahydro-2H-pyran-2-yl)oxy)propyl 4-methylbenzenesulfonate (CAS 1374107-64-8)
- (R)-2-(4-methylpiperazin-1-yl)-2-phenylacetic acid (CAS 1007877-89-5)
- 6-((Isopropylthio)methyl)-2-(methylthio)pyrimidin-4(3H)-one (CAS 1181229-81-1)
- 2,6-Dichloro-3,4'-bipyridine (CAS 1214370-39-4)
- 2-Amino-1-(2-bromo-4-methylphenyl)-4,5-dimethyl-1H-pyrrole-3-carbonitrile (CAS 1152707-93-1)
- 4-(4-(Trifluoromethoxy)benzyl)thiomorpholine 1,1-dioxide (CAS 477864-25-8)
- Gastrin Tetrapeptide (CAS 1947-37-1)
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