5-Chloro-1-phenyl-1H-pyrazole CAS 1127-84-0
| CAS No. | 1127-84-0 |
| Molecular Formula | C9H7ClN2 |
| Molecular Weight | 178.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Chloro-1-phenyl-1H-pyrazole is closely related to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 5-Chloro-1-phenyl-1H-pyrazole (CAS 1127-84-0), a certified reference material (molecular formula C9H7ClN2, MW 178.62 g/mol) for analytical method development and quality control.
5-Chloro-1-phenyl-1H-pyrazole (C9H7ClN2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | 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.) | 1957 |
| 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)
- 3-Chloro-1-phenyl-1H-pyrazole (CAS 1128-55-8)
Recommended Standards
- 3-amino-6-chloro-pyrazine-2-carboxamide (CAS 1125-56-0)
- 4-(4-Chlorophenyl)-1H-pyrazole (CAS 111016-47-8)
- 2-Chloro-6-methylquinazoline (CAS 113082-39-6)
- 2-Chloro-5H,6H,7H-cyclopenta[b]pyridine-3-carbonitrile (CAS 113511-27-6)
- 3-(Bromomethyl)-3-fluoropyrrolidine hydrochloride (CAS 2306268-96-0)
- 5-(3-(Thiophen-2-yl)-1,2,4-oxadiazol-5-yl)isophthalic acid (CAS 823195-17-1)
- 4-[2-(2-Propylphenoxy)ethyl]piperidinehydrochloride (CAS 1219949-30-0)
- (R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-hydroxybutanoic acid (CAS 2243501-43-9)
- 7-Methyl-2-oxo-1,2,3,4-tetrahydroquinoline-6-carboxylic acid (CAS 117030-59-8)
- Methyl 2-acetamido-5-hydroxybenzoate, 97% (CAS 154664-44-5)
- Tert-butyl 2-oxo-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,5-dihydro-1H-pyrrole-1-carboxylate (CAS 2304634-80-6)
- Cabazitaxel Impurity 24 ( (2R,3S)-3-Amino-2-hydroxy-3-phenylpropionic Acid Ethyl Ester) (CAS 143615-00-3)
- (S)-2-(fluorodiphenylmethyl)pyrrolidine (CAS 274674-23-6)
- Des-[Ser]8-Liraglutide (CAS CATO-C4X-199233)
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