5-Hydroxy-6,7-dimethoxy-2-phenyl-4H-chromen-4-one CAS 740-33-0
| CAS No. | 740-33-0 |
| Molecular Formula | C17H14O5 |
| Molecular Weight | 298.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 5-Hydroxy-6,7-dimethoxy-2-phenyl-4H-chromen-4-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies 5-Hydroxy-6,7-dimethoxy-2-phenyl-4H-chromen-4-one (CAS 740-33-0), a certified reference material (molecular formula C17H14O5, MW 298.29 g/mol) for analytical method development and quality control.
Structurally, 5-Hydroxy-6,7-dimethoxy-2-phenyl-4H-chromen-4-one (C17H14O5) 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 298.29 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).
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 | C17H14O5 |
| Molecular Weight | 298.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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.) | 1957 |
Related Hydroxy Standards
- 3-Hydroxy-7-methoxy-2-(4-methoxyphenyl)-4H-chromen-4-one (CAS 13198-99-7)
- 7-Hydroxy-5-methoxy-2-(4-methoxyphenyl)-4H-chromen-4-one (CAS 13698-23-2)
- 1-Hydroxy-5,8-dimethoxy-3-methylanthracene-9,10-dione (CAS 76696-04-3)
- 5-Hydroxy-3,7-dimethoxy-2-phenyl-4H-chromen-4-one (CAS 70786-48-0)
- 6-Hydroxy-7-methoxy-3-(4-methoxyphenyl)-4H-chromen-4-one (CAS 970-48-9)
- 7-Hydroxy-3-(4-methoxyphenoxy)-2-methyl-4h-chromen-4-one (CAS 297148-24-4)
- 8-Hydroxy-1,2-dimethoxy-3-methylanthracene-9,10-dione (CAS 82868-99-3)
- 4-Hydroxy-1-naphthyl-1'-naphthyl ketone (CAS 432049-53-1)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com