3-(3-Ethoxy-4-hydroxybenzylidene)-5-(4-methoxyphenyl)furan-2(3H)-one CAS 6621-91-6
| CAS No. | 6621-91-6 |
| Molecular Formula | C20H18O5 |
| Molecular Weight | 338.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(3-Ethoxy-4-hydroxybenzylidene)-5-(4-methoxyphenyl)furan-2(3H)-one (CAS 6621-91-6), molecular formula C20H18O5 and molecular weight 338.35 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-(3-Ethoxy-4-hydroxybenzylidene)-5-(4-methoxyphenyl)furan-2(3H)-one (C20H18O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 338.35 g/mol, it falls into the moderately-high-molecular-weight range. 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.
As a certified reference material (CRM), 3-(3-Ethoxy-4-hydroxybenzylidene)-5-(4-methoxyphenyl)furan-2(3H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C20H18O5 |
| Molecular Weight | 338.35 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
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Recommended Standards
- 3-(2,3-Dimethoxybenzylidene)-5-(4-methoxyphenyl)furan-2(3H)-one (CAS 6621-90-5)
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- 3-[(4-Fluorophenyl)carbamoyl]phenyl N,N-dimethylsulfamate (CAS 338405-86-0)
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