Butyl 9-(dicyanomethylene)-9H-fluorene-4-carboxylate CAS 93376-18-2
| CAS No. | 93376-18-2 |
| Molecular Formula | C21H16N2O2 |
| Molecular Weight | 328.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 328.36 g/mol gives Butyl 9-(dicyanomethylene)-9H-fluorene-4-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Butyl 9-(dicyanomethylene)-9H-fluorene-4-carboxylate (CAS 93376-18-2), molecular formula C21H16N2O2 and molecular weight 328.36 g/mol, is a CATO reference standard with documented purity and traceability.
Butyl 9-(dicyanomethylene)-9H-fluorene-4-carboxylate (C21H16N2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C21H16N2O2 |
| Molecular Weight | 328.36 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 2 |
Related Butyl Standards
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