4-((9-Hydroxy-9H-fluoren-9-yl)ethynyl)-6-methyl-2H-pyran-2-one CAS 650624-74-1
| CAS No. | 650624-74-1 |
| Molecular Formula | C21H14O3 |
| Molecular Weight | 314.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-((9-Hydroxy-9H-fluoren-9-yl)ethynyl)-6-methyl-2H-pyran-2-one (C21H14O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 314.33 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
4-((9-Hydroxy-9H-fluoren-9-yl)ethynyl)-6-methyl-2H-pyran-2-one (CAS 650624-74-1), molecular formula C21H14O3 and molecular weight 314.33 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C21H14O3 |
| Molecular Weight | 314.33 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
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- NSC 109555 (CAS 15427-93-7)
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- 2-(6-Methylpyridin-2-yl)-3-phenyl-2,3-dihydroquinazolin-4(1H)-one (CAS 345990-72-9)
- 1-Benzyl-5-iodo-4-(trimethylsilyl)-1H-1,2,3-triazole (CAS 1464935-19-0)
- 3-Fluoro-4-(1,1,1,3,3,3-hexafluoropropan-2-yloxy)benzaldehyde (CAS 1707365-32-9)
- 5-Ethyl-5-(2-methylprop-2-en-1-yl)-2-sulfanyl-1,4,5,6-tetrahydropyrimidine-4,6-dione (CAS 115-56-0)
- Semaglutide Impurity 122 (CAS CATO-C4X-2226122)
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