5-(3-Methylphenyl)-1h-pyrazole-4-carboxylic acid CAS 879996-72-2
| CAS No. | 879996-72-2 |
| Molecular Formula | C11H10N2O2 |
| Molecular Weight | 202.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 5-(3-Methylphenyl)-1h-pyrazole-4-carboxylic acid (CAS 879996-72-2), a certified reference material (molecular formula C11H10N2O2, MW 202.21 g/mol) for analytical method development and quality control.
5-(3-Methylphenyl)-1h-pyrazole-4-carboxylic acid (C11H10N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; 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).
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 | C11H10N2O2 |
| Molecular Weight | 202.21 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.) | 1987 |
| Nitrogen Atoms | 2 |
Related Methylphenyl Standards
- 5-(2-Methylphenyl)-1h-pyrazole-4-carboxylic acid (CAS 1007541-87-8)
- 5-(3-Methylphenyl)-1H-pyrazole-3-carboxylic acid (CAS 1037456-61-3)
- 1-(2-Methylphenyl)-1h-pyrazole-3-carboxylic acid (CAS 1152962-55-4)
- 1-(4-Methylphenyl)-1H-pyrazole-3-carboxylic acid (CAS 19532-39-9)
- 1-(2-Methylphenyl)-1h-pyrazole-4-carboxylic acid (CAS 75815-76-8)
- 1-(4-Methylphenyl)-1h-pyrazole-5-carboxylic acid (CAS 72899-93-5)
- 5-(2-Methylphenyl)pyrimidine-2,4-diol (CAS 952402-53-8)
- 5-(3-Methylphenyl)-2,4(1H,3H)-pyrimidinedione (CAS 893737-41-2)
Recommended Standards
- 5-(3-Methoxyphenyl)furan-2-carbaldehyde (CAS 55377-84-9)
- 5-(3-Methoxyphenyl)-1,2-dihydropyrazin-2-one (CAS 88066-90-4)
- 5-(4-methoxyphenyl)-1,2,4-triazin-3-amine (CAS 65943-31-9)
- 5-(3-Methoxyphenyl)-1,2,4-triazin-3-amine (CAS 886497-35-4)
- 5-((Dimethylamino)methyl)-2-(1-methyl-1H-pyrazol-4-yl)aniline (CAS 793667-45-5)
- N-Acetylglycyl-β-alanine (CAS 1016788-34-3)
- N-(4-fluoro-2-methylphenyl)thietan-3-amine (CAS 1862826-47-8)
- 1,3,4-Trimethylimidazolidin-2-one (CAS 24044-24-4)
- 2,4-Thiazolidinedione (CAS 2295-31-0)
- 7H-Purine-7-carbonitrile (CAS 100450-02-0)
- 1-(4-Chlorobenzenesulfonyl)-4-{5-[3-(trifluoromethyl)phenyl]-1H-pyrazol-3-yl}piperidine (CAS 1025724-67-7)
- 8-Bromo-6-chloro-2H-benzo[d][1,3]oxazine-2,4(1H)-dione (CAS 122588-67-4)
- 1246815-81-5 Pyrazinoic Acid-d3 Ethyl Ester (CAS 1246815-81-5)
- Semaglutide Impurity 12 (CAS CATO-C4X-222612)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com