7-Hydroxy-8-methyl-2h-1-benzopyran-2-one CAS 2732-17-4
| CAS No. | 2732-17-4 |
| Molecular Formula | C10H8O3 |
| Molecular Weight | 176.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7-Hydroxy-8-methyl-2h-1-benzopyran-2-one (CAS 2732-17-4), molecular formula C10H8O3 and molecular weight 176.17 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 7-Hydroxy-8-methyl-2h-1-benzopyran-2-one (C10H8O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 176.17 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C10H8O3 |
| Molecular Weight | 176.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
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Recommended Standards
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- 7-Methoxy-1,5-naphthyridin-2(1H)-one (CAS 959615-59-9)
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- 17-Beta-Estradiol 17-Valerate (CAS 979-32-8)
- (3R,4S,5S,6R)-6-(aminomethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrochloride (CAS 4460-60-0)
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- 3-(4,6-Dimethylpyrimidin-2-yl)-1-methyl-1-phenylguanidine (CAS 34747-68-7)
- Regadenoson Impurity 43 (CAS CATO-C4X-198543)
- 2,6-Dibromo-4,4-dioctyl-4H-cyclopenta[1,2-b:5,4-b']dithiophene (CAS 478404-10-3)
- [Ser]8-Acetylated Semaglutide (CAS CATO-C4X-2226218)
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