4-hydroxy-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylic acid CAS 1152601-80-3
| CAS No. | 1152601-80-3 |
| Molecular Formula | C11H10N2O4 |
| Molecular Weight | 234.21 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 4-hydroxy-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylic acid.
CATO supplies 4-hydroxy-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylic acid (CAS 1152601-80-3), a certified reference material (molecular formula C11H10N2O4, MW 234.21 g/mol) for analytical method development and quality control.
Based on its molecular formula C11H10N2O4, 4-hydroxy-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylic acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 234.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C11H10N2O4 |
| Molecular Weight | 234.21 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 methanol, ethanol, DMSO |
| 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.) | 1989 |
| Nitrogen Atoms | 2 |
Related hydroxy Standards
- Methyl 2-hydroxy-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (CAS 1105189-72-7)
- Methyl 2-hydroxy-8-methyl-4-oxo-4h-pyrido[1,2-a]pyrimidine-3-carboxylate (CAS 1105189-76-1)
- 5-Hydroxy-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylic acid (CAS 1192798-40-5)
- 5-(4-Hydroxy-3-methoxyphenyl)-1h-pyrazole-3-carboxylic acid (CAS 1229025-28-8)
- 2-(6-Hydroxy-2-methyl-4-oxo-3,4-dihydroquinazolin-3-yl)acetic acid (CAS 1322605-11-7)
- 4-(3-(5-Hydroxy-3-methylisoxazol-4-yl)allylidene)-3-methylisoxazol-5(4H)-one (CAS 14532-33-3)
- (7-Hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid hydrazide, 97% (CAS 15991-14-7)
- 1-(1-Hydroxy-2-methyl-6-nitro-1H-indol-3-yl)ethanone (CAS 503536-33-2)
Recommended Standards
- 2-Methyl-2-(4-(trifluoromethoxy)phenyl)propan-1-ol (CAS 115012-42-5)
- Indazole-3,4-dicarboxylic Acid Methyl Ester (CAS 1167055-66-4)
- 1,3-Dimethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-7-carboxylic acid (CAS 1146293-67-5)
- 5-Ethyl-1-(6-hydroxypyridazin-3-yl)-1H-pyrazole-4-carboxylic acid (CAS 1170858-25-9)
- 1-(2-Amino-5-fluorophenyl)-2-phenylethanone (CAS 728024-64-4)
- (3AR,4S,9bS)-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid (CAS 1415811-43-6)
- N,N’-(Hexane-1,6-diyl)bis(2,2-dimethylhydrazinecarboxamide) (CAS 69938-76-7)
- 2-[2-(Dimethylamino)ethoxy]-3-methoxybenzaldehyde (CAS 883549-58-4)
- (S)-N-(2-(4-Isopropyl-4,5-dihydrooxazol-2-yl)-6-methoxyphenyl)methanesulfonamide (CAS 546141-34-8)
- (Thiophen-2-ylsulfonyl)methionine (CAS 82068-29-9)
- Varenicline Impurity C61 (CAS 357424-12-5)
- 2-Chloro-1-(4-(2-methoxyphenyl)piperazin-1-yl)ethan-1-one (CAS 21057-39-6)
- 4,4-Dichloro-3-(Chloro-Difluoro-Methyl)-4-Fluoro-3-Hydroxy-Butanal (CAS 100482-85-7)
- Osteogenic Growth Peptide (CAS 132996-61-3)
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