5-Amino-1-(2-methylphenyl)-1h-pyrazole-4-carboxylic acid CAS 14678-91-2
| CAS No. | 14678-91-2 |
| Molecular Formula | C11H11N3O2 |
| Molecular Weight | 217.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 5-Amino-1-(2-methylphenyl)-1h-pyrazole-4-carboxylic acid (C11H11N3O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-Amino-1-(2-methylphenyl)-1h-pyrazole-4-carboxylic acid (CAS 14678-91-2) is a high-purity analytical reference standard with the molecular formula C11H11N3O2 and a molecular weight of 217.22 g/mol.
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), 5-Amino-1-(2-methylphenyl)-1h-pyrazole-4-carboxylic acid 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 | C11H11N3O2 |
| Molecular Weight | 217.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 3 |
Related Amino Standards
- 5-Amino-3-(3-methylphenyl)-1,2-oxazole-4-carboxamide (CAS 1005509-32-9)
- 4-[(3-amino-1h-pyrazol-1-yl)methyl]benzoic acid (CAS 1006348-84-0)
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- Methyl 4-amino-3-hydroxy-2-naphthoate (CAS 104655-33-6)
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- 5-Amino-3-(2-methylphenyl)-1,2-oxazole-4-carboxamide (CAS 1148027-16-0)
- 3-((4-Amino-1H-pyrazol-1-yl)methyl)benzoic acid (CAS 1209267-81-1)
Recommended Standards
- Carbaryl Impurity 12 (CAS 146074-42-2)
- 5-Amino-1-(p-tolyl)-1H-pyrazole-4-carboxylic acid (CAS 14678-93-4)
- Methyl 7-cyclopropylpyrazolo[1,5-a]pyrimidine-5-carboxylate (CAS 1458593-65-1)
- Methyl 2-hydroxy-2-(quinolin-3-yl)acetate (CAS 1479466-07-3)
- 3-Amino-N-(2,5-dimethoxyphenyl)-4,6-diphenylthieno[2,3-b]pyridine-2-carboxamide (CAS 337354-48-0)
- 2-([1,1'-Biphenyl]-4-yloxy)-1,4-diamino-6-chloroanthracene-9,10-dione (CAS 88605-25-8)
- N-(5-Amino-2,4-diiodophenyl)acetamide (CAS 123765-81-1)
- Momelotinib impurity 18 (CAS CATO-C4X-337718)
- N1-(Pyridin-4-ylmethyl)-N2-(thiophen-2-ylmethyl)oxalamide (CAS 941938-78-9)
- 8-bromo-3-fluoro-naphthalen-1-amine (CAS 2387597-86-4)
- Cis-1-methyl-1,2,3,4-tetrahydroisoquinoline-4,6,7-triol (CAS 139254-75-4)
- 2-Chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine, 97% (CAS 1060815-90-8)
- Topiramate Impurity 1 (CAS 32785-90-3)
- (Pro3)-Gastric Inhibitory Polypeptide (human) trifluoroacetate salt (CAS 299898-52-5)
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