176665-78-4 [1]Benzopyrano[5,4,3-cde][1]benzopyran-5,10-dione,2,8-dihydroxy-3-methoxy-7-(b-D-xylopyranosyloxy)- CAS 176665-78-4
| CAS No. | 176665-78-4 |
| Molecular Formula | C20H16O12 |
| Molecular Weight | 448.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
176665-78-4 [1]Benzopyrano[5,4,3-cde][1]benzopyran-5,10-dione,2,8-dihydroxy-3-methoxy-7-(b-D-xylopyranosyloxy)- (CAS 176665-78-4) is a high-purity analytical reference standard with the molecular formula C20H16O12 and a molecular weight of 448.33 g/mol.
Based on its molecular formula C20H16O12, 176665-78-4 [1]Benzopyrano[5,4,3-cde][1]benzopyran-5,10-dione,2,8-dihydroxy-3-methoxy-7-(b-D-xylopyranosyloxy)- 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 448.33 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).
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 | C20H16O12 |
| Molecular Weight | 448.33 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2007 |
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