1-(2-Methylphenyl)-1H-pyrazole CAS 20157-44-2
| CAS No. | 20157-44-2 |
| Molecular Formula | C10H10N2 |
| Molecular Weight | 158.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-(2-Methylphenyl)-1H-pyrazole.
1-(2-Methylphenyl)-1H-pyrazole (CAS 20157-44-2), molecular formula C10H10N2 and molecular weight 158.20 g/mol, is a CATO reference standard with documented purity and traceability.
1-(2-Methylphenyl)-1H-pyrazole (C10H10N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-(2-Methylphenyl)-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 | C10H10N2 |
| Molecular Weight | 158.20 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | 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.) | 1962 |
| Nitrogen Atoms | 2 |
Related Methylphenyl Standards
- 4-(4-Methylphenyl)-1H-pyrazole (CAS 111016-46-7)
- 4-(3-Methylphenyl)-1H-pyrazole (CAS 1260785-58-7)
- 1-(3-Methylphenyl)-2,3-butadien-1-one (CAS 155586-46-2)
- 1-(2-Methylphenyl)-2,3-butadien-1-one (CAS 378186-94-8)
- 1-(4-Methylphenyl)-2,3-butadien-1-one (CAS 378186-93-7)
- 2-(2-Methylphenyl)furan (CAS 38527-54-7)
- 2-(3-Methylphenyl)-1H-imidazole (CAS 21202-37-9)
- 2-(4-Methylphenyl)imidazole (CAS 37122-50-2)
Recommended Standards
- 1-(2-methoxyethyl)-1H-imidazole-2-carbaldehyde (CAS 558446-64-3)
- 1-(2-Ethynylphenyl)propan-2-one (CAS 2228247-25-2)
- 1-(3-Amino-2-hydroxypropyl)pyrrolidin-2-one (CAS 20958-23-0)
- 1-(1-Hydroxypropan-2-yl)-4-methylimidazolidin-2-one (CAS 670227-87-9)
- Methyl 1,4-dimethoxy-2-naphthoate (CAS 127536-35-0)
- cis-(1s,3s)-3-(Trifluoromethoxy)cyclobutane-1-carbaldehyde (CAS 2278284-07-2)
- Ethyl 6,8-dichloro-2-(pyridin-3-yl)quinoline-4-carboxylate (CAS 6332-48-5)
- 1-(4-Nitrophenoxy)-3-(trifluoromethyl)benzene (CAS 2303-26-6)
- 4-(Methylsulfonyl)-2-(trifluoromethoxy)aniline (CAS 2637446-26-3)
- 4-(4-Formylpiperazin-1-yl)-4-oxobut-2-enoic acid (CAS 929474-10-2)
- Dapagliflozin Impurity 26 (CAS 2305949-36-2)
- 4-(2,5-Dioxopyrrolidin-1-yl)-2-methyl-2-(methylamino)butanamide (CAS 1247379-51-6)
- 4,4-Dimethylcycloheptan-1-amine (CAS 833454-19-6)
- Tau Peptide (274-288) trifluoroacetate salt (CAS 330456-39-8)
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