6,7-Diethoxy-1-(2-methoxyphenyl)-3,4-dihydro-1h-2-benzopyran-3-one CAS 639005-77-9
| CAS No. | 639005-77-9 |
| Molecular Formula | C20H22O5 |
| Molecular Weight | 342.39 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.
6,7-Diethoxy-1-(2-methoxyphenyl)-3,4-dihydro-1h-2-benzopyran-3-one (CAS 639005-77-9) is a high-purity analytical reference standard with the molecular formula C20H22O5 and a molecular weight of 342.39 g/mol.
The molecular framework of 6,7-Diethoxy-1-(2-methoxyphenyl)-3,4-dihydro-1h-2-benzopyran-3-one (C20H22O5) is characterized by a flavonoid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C20H22O5 |
| Molecular Weight | 342.39 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
Related Diethoxy Standards
- 2,2'-Diethoxy-1,1'-binaphthalene (CAS 109135-27-5)
- 3,4-Diethoxy-N-(4-phenylbutan-2-yl)benzamide (CAS 724734-52-5)
- 4,5-Diethoxy-2-iodobenzoic acid (CAS 133682-08-3)
- (2,5-Diethoxy-4-nitrophenyl)(p-tolyl)sulfane (CAS 68400-47-5)
- (6,7-Diethoxy-3-methylbenzofuran-2-yl)(morpholino)methanone (CAS 40713-21-1)
- 2-(1,1-Diethoxy-2-methyl)propyl 4'-Nitrophenyl Carbonate-d6 (CAS 1246816-85-2)
- Diethoxy-triphenylphosphane (CAS 18509-25-6)
- 3,3'-Diethoxy-[1,1'-biphenyl]-4,4'-dicarboxylicacid (CAS 2051918-30-8)
Recommended Standards
- 6-([1,1'-Biphenyl]-4-yl)-2-oxo-4-(pyrrolidin-1-yl)-2H-pyran-3-carbonitrile (CAS 577993-30-7)
- 6-[2-(2,6-dioxo-3-piperidyl)-1-oxo-isoindolin-5-yl]hexanal (CAS 2762039-46-1)
- 5-Hydroxy-4-(4-((phenylamino)methyl)phenyl)isoquinolin-1(2H)-one (CAS 651029-40-2)
- 6-[2-(2,6-dioxo-3-piperidyl)-3-oxo-isoindolin-5-yl]hexanal (CAS 2762039-49-4)
- 3-(4-(3-(Trifluoromethyl)phenyl)pyridin-2-yl)-1,2,4-oxadiazol-5(4H)-one (CAS 1219453-92-5)
- 2-(3,4,5-Trimethoxyphenyl)-2,3-dihydroquinolin-4(1H)-one (CAS 158117-28-3)
- Methyl 2-acetamido-5-chlorobenzoate (CAS 20676-54-4)
- N-(2-(thiophen-2-yl)ethyl)tetrahydro-2H-thiopyran-3-amine (CAS 1310145-60-8)
- (S)-2-amino-2-(4-fluoro-2-methoxyphenyl)ethan-1-ol (CAS 1212862-50-4)
- Rosuvastatin Impurity 68 (CAS CATO-C4X-116968)
- Phenylmercury nitrate(Technical) (CAS 55-68-5)
- 3-((((1,5-Dimethyl-1H-pyrazol-4-yl)methyl)amino)methyl)phenol hydrochloride (CAS 1856078-20-0)
- (3R,6R)-Methyl 6-methylpiperidine-3-carboxylate hydrochloride (CAS 1009377-11-0)
- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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