5-(4-Ethoxyphenyl)-1h-pyrazole-4-carboxylic acid CAS 879996-67-5
| CAS No. | 879996-67-5 |
| Molecular Formula | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(4-Ethoxyphenyl)-1h-pyrazole-4-carboxylic acid (CAS 879996-67-5) is a high-purity analytical reference standard with the molecular formula C12H12N2O3 and a molecular weight of 232.24 g/mol.
Structurally, 5-(4-Ethoxyphenyl)-1h-pyrazole-4-carboxylic acid (C12H12N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 232.24 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C12H12N2O3 |
| Molecular Weight | 232.24 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 Ethoxyphenyl Standards
- 1-(4-Ethoxyphenyl)-1,4-dihydropyrazine-2,3-dione (CAS 1031557-37-5)
- 5-(2-Ethoxyphenyl)-1h-pyrazole-4-carboxylic acid (CAS 1152542-59-0)
- 5-(3-Ethoxyphenyl)pyrimidine-2,4-diol (CAS 1261942-74-8)
- 6-(4-Ethoxyphenyl)pyrimidine-2,4(1H,3H)-dione (CAS 1368650-74-1)
- 1-(2-Ethoxyphenyl)-1,4-dihydropyrazine-2,3-dione (CAS 900012-17-1)
- 3-(2-Ethoxyphenyl)-1H-pyrazole-5-carboxylic acid (CAS 890621-20-2)
- 890591-56-7 3-(4-ethoxyphenyl)-1H-pyrazole-5-carboxylic acid DTXSID10390262 (CAS 890591-56-7)
- 5-(2-Ethoxyphenyl)cyclohexane-1,3-dione (CAS 1092288-99-7)
Recommended Standards
- 5-(3-Methoxyphenyl)-1h-pyrazole-3-carbohydrazide (CAS 890007-17-7)
- 5-(4-Methoxyphenyl)-1-methyl-1h-pyrazole-3-carboxylic acid (CAS 957312-76-4)
- 5-(3,4-Dimethoxyphenyl)-1,2,4-triazin-3-amine (CAS 886497-53-6)
- 5-(Hydroxy(p-tolyl)methyl)pyrimidine-2,4(1H,3H)-dione (CAS 91393-24-7)
- 1-(3-(3-Methyl-1,2,4-oxadiazol-5-yl)pyridin-2-yl)-1H-imidazole-4-carboxylic acid (CAS 1239851-29-6)
- 2-Mercapto-5,6-dimethyl-3-(3-methylphenyl)thieno[2,3-d]pyrimidin-4(3h)-one (CAS 568560-86-1)
- 4,4-Difluoro-2-methoxycyclohexanone (CAS 1232060-73-9)
- n-(Piperidin-4-yl)-4-(trifluoromethyl)pyrimidin-2-amine dihydrochloride (CAS 951004-19-6)
- 3-Bromo-2-methyl-6,7-dihydropyrazolo[1,5-a]pyrazin-4(5H)-one (CAS 1301714-27-1)
- 1-Bromo-3-(2-bromo-1-propoxyethyl)benzene (CAS 1251376-52-9)
- 1-(Furan-2-yl)cyclopentan-1-amine (CAS 1222256-72-5)
- 2-(((3,5-Dimethylpyridin-2-yl)methyl)sulfinyl)-5-methoxy-1H-indole (CAS 1346240-10-5)
- Spiramycin EP Impurity E (CAS CATO-C4X-23255)
- Des-Ile27-Tirzepatide (CAS CATO-CPTD788946)
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