5-Chloro-1-methyl-3-(p-tolyl)-1H-pyrazole CAS 524740-34-9
| CAS No. | 524740-34-9 |
| Molecular Formula | C11H11ClN2 |
| Molecular Weight | 206.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Chloro-1-methyl-3-(p-tolyl)-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.
CATO supplies 5-Chloro-1-methyl-3-(p-tolyl)-1H-pyrazole (CAS 524740-34-9), a certified reference material (molecular formula C11H11ClN2, MW 206.67 g/mol) for analytical method development and quality control.
Structurally, 5-Chloro-1-methyl-3-(p-tolyl)-1H-pyrazole (C11H11ClN2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 206.67 g/mol, it falls into the medium-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C11H11ClN2 |
| Molecular Weight | 206.67 g/mol |
| 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.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- ethyl 2-chloro-5-methyl-3-oxohexanoate (CAS 1033707-35-5)
- 4-Chloro-5-methyl-3-p-tolyl-1H-pyrazole (CAS 106365-49-5)
- 3-Chloro-N,N-dimethylisoquinolin-1-amine (CAS 1079651-09-4)
- Ethyl 3-chloro-5-methyl-2-oxohexanoate (CAS 111055-64-2)
- 8-Chloro-1,2,3,4-tetrahydrodibenzo[b,d]furan (CAS 112255-25-1)
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- 2-Chloro-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-3-carbonitrile (CAS 115248-58-3)
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Recommended Standards
- 5-Chloro-1,6-dihydro-[1,1'-biphenyl]-3(2H)-one (CAS 51367-64-7)
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- 5-(Chloromethyl)-1-methyl-3-phenyl-1h-pyrazole (CAS 869901-14-4)
- 5-Chloro-2,8-dimethylquinolin-4-amine (CAS 948292-79-3)
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- Methyl sorbate (CAS 689-89-4)
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- (R)-2-((tert-Butoxycarbonyl)amino)-3-(3,4,5-trifluorophenyl)propanoic acid (CAS 205445-55-2)
- Ethyl 4-(tert-butyl)-3,5-dimethyl-1H-pyrrole-2-carboxylate (CAS 28991-95-9)
- 2-Chloro-4-(3-methoxyphenyl)benzoic acid (CAS 1237071-49-6)
- 5-(4-Bromothiophen-2-yl)-4-ethyl-4h-1,2,4-triazole-3-thiol (CAS 828276-13-7)
- 2-Methoxy-5,6,7,8-tetrahydro-1,6-naphthyridine (CAS 676994-61-9)
- 5-Fluoro-2-methyl-1H-pyrrolo[2,3-c]pyridine (CAS 2231677-06-6)
- MLCK inhibitor peptide 18 (CAS 224579-74-2)
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