4,7-Dihydroxy-3-methoxyisoflavone CAS 21913-98-4
| CAS No. | 21913-98-4 |
| Molecular Formula | C16H12O5 |
| Molecular Weight | 284.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4,7-Dihydroxy-3-methoxyisoflavone (C16H12O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 284.26 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
4,7-Dihydroxy-3-methoxyisoflavone (CAS 21913-98-4) is a high-purity analytical reference standard with the molecular formula C16H12O5 and a molecular weight of 284.26 g/mol.
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.
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 | C16H12O5 |
| Molecular Weight | 284.26 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, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
Related Dihydroxy Standards
- 1,3-Dihydroxy-8-methoxy-6-methylanthracene-9,10-dione (CAS 3775-08-4)
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- 1,6-Dihydroxy-5-methoxy-2-methylanthracene-9,10-dione (CAS 64809-71-8)
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Recommended Standards
- 4-[(2-fluorophenyl)sulfamoyl]-1h-pyrrole-2-carboxylic acid (CAS 937621-15-3)
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- Methyl 4-bromobenzo[b]thiophene-2-carboxylate (CAS 360575-29-7)
- 4-(Difluoromethyl)-5-fluoro-2-methoxy-3-(trifluoromethyl)pyridine (CAS 1805565-74-5)
- ethyl 7-chloro-1H-benzimidazole-2-carboxylate (CAS 1339789-49-9)
- 6-Chloro-[1,2,4]triazolo[4,3-b]pyridazine-3-thiol (CAS 111317-12-5)
- ((2R,3R,4R,5R)-5-(4-Amino-2-oxopyrimidin-1(2H)-yl)-3-hydroxy-4-methoxytetrahydrofuran-2-yl)methyl tetrahydrogen triphosphate (CAS 143028-98-2)
- Diloxanide (CAS 579-38-4)
- 5-Benzyl-4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridin-3-amine (CAS 61082-53-9)
- [1-(4-Methoxyphenyl)-3-methylpyrazol-4-yl]boronic acid (CAS 2377607-71-9)
- 4,4,5,5-Tetramethyl-2-(4-(4-((tetrahydro-2H-pyran-2-yl)oxy)butoxy)-phenyl)-1,3,2-dioxaborolane (CAS 1210827-89-6)
- 1-His-N-a-ethylidene Semaglutide (CAS CATO-C4X-2226252)
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