4-Hydroxy-1-(4-methoxyphenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylic acid CAS 121582-69-2
| CAS No. | 121582-69-2 |
| Molecular Formula | C12H10N2O5 |
| Molecular Weight | 262.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Hydroxy-1-(4-methoxyphenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylic acid (CAS 121582-69-2) is a high-purity analytical reference standard with the molecular formula C12H10N2O5 and a molecular weight of 262.22 g/mol.
Based on its molecular formula C12H10N2O5, 4-Hydroxy-1-(4-methoxyphenyl)-6-oxo-1,6-dihydropyridazine-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 262.22 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).
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.
Physical & Chemical Properties
| Molecular Formula | C12H10N2O5 |
| Molecular Weight | 262.22 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 2 |
Related Hydroxy Standards
- Ethyl 4-hydroxy-6-nitroquinoline-3-carboxylate (CAS 103514-53-0)
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Recommended Standards
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- N-(4-Methoxyphenyl)-5-nitrofuran-3-carboxamide (CAS 122060-90-6)
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- Tert-butyl ethyl(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)carbamate (CAS 1032758-86-3)
- 1-(4-Fluorophenyl)-5-phenyl-1H-imidazole-2-thiol (CAS 1097132-88-1)
- 5-((Cis-4-aminocyclohexyl)oxy)isoquinoline-4-carbonitrile (CAS 651308-56-4)
- 7-Bromo-2,4-dichloro-5H-pyrimido[5,4-b]indole (CAS 1034194-00-7)
- 1-Ethyl-3-methyl-1H-pyrazol-5-ol (CAS 82439-92-7)
- Rivaroxaban Impurity 39 (CAS 446292-07-5)
- 1-Fluoro-4-(3-nitrophenyl)benzene (CAS 10540-32-6)
- Semaglutide Impurity 192 (CAS CATO-C4X-2226192)
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