2H-1-Benzopyran-7-ol, 3-[4-(acetyloxy)phenyl]-, 7-acetate CAS 81267-66-5
| CAS No. | 81267-66-5 |
| Molecular Formula | C19H16O5 |
| Molecular Weight | 324.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 324.33 g/mol gives 2H-1-Benzopyran-7-ol, 3-[4-(acetyloxy)phenyl]-, 7-acetate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2H-1-Benzopyran-7-ol, 3-[4-(acetyloxy)phenyl]-, 7-acetate (CAS 81267-66-5), molecular formula C19H16O5 and molecular weight 324.33 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C19H16O5, 2H-1-Benzopyran-7-ol, 3-[4-(acetyloxy)phenyl]-, 7-acetate 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 324.33 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C19H16O5 |
| Molecular Weight | 324.33 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.) | 1980 |
Related H Standards
- 2H-1-Benzopyran-2-one,8-[1-(acetyloxy)-3- methyl-2-oxobutyl]-7-methoxy-,(+)- 95360-22-8 (CAS 95360-22-8)
- 22934-99-2 4H-1-Benzopyran-4-one,5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-6-methoxy- (CAS 22934-99-2)
- 3122-87-0 4H-1-Benzopyran-4-one, 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxy-6,8-dimethyl- 5-Hydroxy-2-(4-hydroxyphenyl)-7-methoxy-6,8-dimethyl-4H-1-benzopyran-4-one (CAS 3122-87-0)
- 2H-1-Benzopyran-2-one, 6-[(1R,2S)-2,3-dihydroxy-1-methoxy-3-methylbutyl]-7-methoxy- (CAS 425370-70-3)
- 92519-95-4 4H-1-Benzopyran-4-one, 2-(2,6-dihydroxyphenyl)-3,5,7-trihydroxy- 2-(2,6-Dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one Viscidulin I (CAS 92519-95-4)
- 6563-66-2 4H-1-Benzopyran-4-one, 5,6,7-trihydroxy-2-(4-methoxyphenyl)- DTXSID50457727 (CAS 6563-66-2)
- 4569-98-6 4H-1-Benzopyran-4-one, 7-hydroxy-3-(4-hydroxyphenyl)-5-methoxy- 7-Hydroxy-3-(4-hydroxyphenyl)-5-methoxy-4H-1-benzopyran-4-one Isoprunetin 5--O-Methylgenistein (CAS 4569-98-6)
- 2H-1-Benzopyran-2-one,5,7-dimethoxy-8-[(3-methyl-2-buten-1-yl)oxy]- 96917-26-9 (CAS 96917-26-9)
Recommended Standards
- 2-Amino-4-(4-ethoxyphenyl)-7-methyl-5-oxo-4H,5H-pyrano[4,3-b]pyran-3-carbonitrile (CAS 315246-05-0)
- 3-(2-(3,4-Dimethoxyphenyl)imidazo[1,2-a]pyridin-3-yl)acrylic acid (CAS 727652-22-4)
- 2-Amino-4-(3,4-dimethoxyphenyl)-7-hydroxy-4H-chromene-3-carbonitrile (CAS 312266-56-1)
- 3-(2,4-Dimethoxyphenyl)-1-phenyl-1h-pyrazole-4-carboxylic acid (CAS 956611-49-7)
- (S)-2-Amino-3-(pyrimidin-5-yl)propanoic acid (CAS 309296-08-0)
- (1S,2R)-1-((3,5-Di-tert-butyl-2-hydroxybenzylidene)amino)-2,3-dihydro-1H-inden-2-ol (CAS 212378-89-7)
- 4-Fluoro-2-methyl-N-(1-pivaloylindolin-6-yl)benzenesulfonamide (CAS 1040660-25-0)
- Tocopherol Impurity 4 (CAS 3808-26-2)
- 5-(But-3-en-1-yl)-3-trityl-4,5-dihydroisoxazole (CAS 111379-53-4)
- (3-(Piperidin-1-ylmethyl)phenyl)(2-(trifluoromethyl)phenyl)methanone (CAS 898793-34-5)
- 2-(((6-Oxo-2-propylheptyl)oxy)carbonyl)benzoic Acid (CAS 1373125-92-8)
- (E)-1,2-Bis(3,5-dimethylphenyl)ethene (CAS 13863-27-9)
- Indoxacarb Impurity 7 (CAS 144171-39-1)
- Fibrinogen-Binding Inhibitor Peptide (CAS 89105-94-2)
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