5-Hydroxy-8,8-dimethyl-10-(2-methylbut-3-en-2-yl)-7,8-dihydro-2H,6H-pyrano[3,2-g]chromene-2,6-dione CAS 28384-44-3
| CAS No. | 28384-44-3 |
| Molecular Formula | C19H20O5 |
| Molecular Weight | 328.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C19H20O5, 5-Hydroxy-8,8-dimethyl-10-(2-methylbut-3-en-2-yl)-7,8-dihydro-2H,6H-pyrano[3,2-g]chromene-2,6-dione contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 328.36 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
5-Hydroxy-8,8-dimethyl-10-(2-methylbut-3-en-2-yl)-7,8-dihydro-2H,6H-pyrano[3,2-g]chromene-2,6-dione (CAS 28384-44-3) is a high-purity analytical reference standard with the molecular formula C19H20O5 and a molecular weight of 328.36 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 | C19H20O5 |
| Molecular Weight | 328.36 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.) | 1965 |
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- 1,1-Biphenyl, 3-fluoro-4-nitro-4-(trifluoromethoxy)- (CAS 1191048-24-4)
- Des-Trp25-Tirzepatide (CAS CATO-CPTD788948)
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