2,3-Dihydro-7-hydroxycyclopenta[c][1]benzopyran-4(1H)-one CAS 21260-41-3
| CAS No. | 21260-41-3 |
| Molecular Formula | C12H10O3 |
| Molecular Weight | 202.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 202.21 g/mol gives 2,3-Dihydro-7-hydroxycyclopenta[c][1]benzopyran-4(1H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 2,3-Dihydro-7-hydroxycyclopenta[c][1]benzopyran-4(1H)-one (CAS 21260-41-3), a certified reference material (molecular formula C12H10O3, MW 202.21 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2,3-Dihydro-7-hydroxycyclopenta[c][1]benzopyran-4(1H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 202.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C12H10O3 |
| Molecular Weight | 202.21 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
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Recommended Standards
- 2,2-DIMETHYL-3-OXO-3,4-DIHYDRO-2H-BENZO[B][1,4]OXAZINE-6-CARBONITRILE (CAS 205818-52-6)
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- 2,2',3-Trihydroxydiphenyl Ether Standard (CAS 91368-55-7)
- 2,3-Dimethylquinoxaline-5-carboxylic acid (CAS 6924-67-0)
- 2-(3-Amino-1h-1,2,4-triazol-1-yl)-1-(piperidin-1-yl)ethan-1-one (CAS 1178290-30-6)
- rel-tert-Butyl (1R,4R,5S)-5-hydroxy-2-azabicyclo[2.2.2]octane-2-carboxylate (CAS 617714-54-2)
- 4-(tert-Butoxycarbonyl)-1-(6-chloro-2-(methylthio)pyrimidin-4-yl)piperazine-2-carboxylic acid (CAS 1261229-84-8)
- 5-Ethyl-3-(2-(piperazin-1-yl)quinolin-3-yl)-1,2,4-oxadiazole (CAS 1431729-23-5)
- trans-1-tert-butyl-4-(trifluoromethyl)pyrrolidine-3-carboxylic acid hydrochloride (CAS 1808585-99-0)
- 2-Amino-N-((S)-1-(3-chlorophenyl)ethyl)-N,3-dimethylbutanamide (CAS 1290214-66-2)
- 3-Bromo-4-hydroxy-6-methyl-2h-pyran-2-one (CAS 23668-07-7)
- 2-Chloro-6-methylthiophenol (CAS 18858-05-4)
- 1-Benzyl-4-(4,4,6-trimethyl-1,3,2-dioxaborinan-2-yl)-1H-pyrazole (CAS 2096996-16-4)
- Semaglutide impurity 258 (CAS CATO-C4X-2226258)
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