4-Chloro-1-(4-nitrobenzyl)-1h-pyrazole CAS 512809-55-1
| CAS No. | 512809-55-1 |
| Molecular Formula | C10H8ClN3O2 |
| Molecular Weight | 237.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Chloro-1-(4-nitrobenzyl)-1h-pyrazole (C10H8ClN3O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies 4-Chloro-1-(4-nitrobenzyl)-1h-pyrazole (CAS 512809-55-1), a certified reference material (molecular formula C10H8ClN3O2, MW 237.64 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.
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 | C10H8ClN3O2 |
| Molecular Weight | 237.64 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
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- 2-Chloro-6-hydroxy-7-methoxyquinoline-3-carbaldehyde (CAS 1046138-52-6)
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Recommended Standards
- 4-Acetyl-4-chloro-2-phenyloxazol-5(4H)-one (CAS 90127-57-4)
- 4-Chloro-1-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylic acid (CAS 84088-52-8)
- 4-{[(5-chloro-2-hydroxyphenyl)amino]methylidene}-4,5-dihydro-1H-pyrazol-5-one (CAS 339020-79-0)
- 4-Chloro-7-methoxyquinazoline-6-carboxamide (CAS 2366148-94-7)
- 6-(Difluoromethyl)-5-methylpyrimidin-4(1H)-one (CAS 425394-85-0)
- 5-Methyl-1-[(5-methyl-1,2-oxazol-3-yl)methyl]-1h-1,2,3-triazole-4-carboxylic acid (CAS 1250695-77-2)
- 8-Iodoquinolin-2(1H)-one (CAS 1261578-65-7)
- Dexmedetomidine Impurity 82 (CAS CATO-C4X-123082)
- Methyl 2-allylpiperidine-1-carboxylate (CAS 133127-73-8)
- Cefdinir Impurity 28 (CAS CATO-C4X-121028)
- 5-(1,1-Dimethoxyethyl)-1H-pyrazole (CAS 1188281-53-9)
- 4-({[(4-chlorophenyl)methyl]sulfanyl}methyl)-6-[(2,4-dichlorophenyl)sulfanyl]-2-(pyridin-2-yl)pyrimidine (CAS 338960-86-4)
- 1-(4-(Benzyloxy)-5-bromo-2-hydroxyphenyl)ethanone (CAS 860537-86-6)
- Hexapeptide-10 (CAS 146439-94-3)
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