3-(3,4-Dimethoxyphenyl)-6-ethoxy-4-methyl-2H-chromen-2-one CAS 720674-30-6
| CAS No. | 720674-30-6 |
| Molecular Formula | C20H20O5 |
| Molecular Weight | 340.37 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.
3-(3,4-Dimethoxyphenyl)-6-ethoxy-4-methyl-2H-chromen-2-one (CAS 720674-30-6), molecular formula C20H20O5 and molecular weight 340.37 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-(3,4-Dimethoxyphenyl)-6-ethoxy-4-methyl-2H-chromen-2-one (C20H20O5) 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 340.37 g/mol, it falls into the moderately-high-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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H20O5 |
| Molecular Weight | 340.37 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.) | 1986 |
Related Dimethoxyphenyl Standards
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Recommended Standards
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- 3-(5-(Tert-butoxycarbonyl)-5H-pyrido[4,3-b]indol-7-yl)propanoic acid (CAS 2267291-24-5)
- 4,4,5,5-Tetramethyl-2-(8-(trifluoromethoxy)naphthalen-1-yl)-1,3,2-dioxaborolane (CAS 2621937-27-5)
- ethyl 2-amino-2-cycloheptylacetate hydrochloride (CAS 1909309-58-5)
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- 8-Bromochroman-4-carboxylic acid (CAS 1374574-72-7)
- 3-Chloro-5-fluoro-7-nitro-2H-benzo[e][1,2,4]thiadiazine 1,1-dioxide (CAS 1437458-04-2)
- Ethyl 5-cyano-2-phenyl-6-[(prop-2-en-1-yl)amino]pyridine-3-carboxylate (CAS 477865-99-9)
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- Bisphenol A(3-Chloro-2-Hydroxypropyl)(2,3-Dihydroxypropyl)Ether (CAS 227947-06-0)
- [His]1-Acetylated Semaglutide (CAS CATO-C4X-2226219)
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