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18 Crown 6, with the mf:C12H24O6 and mw: 264.32, is a typical macrocyclic polyether coordination compound that exhibits excellent complexation selectivity toward alkali metal ions. It is readily soluble in water, ethanol, and chloroform, and is chemically stable. It is primarily used as a phase-transfer catalyst, an ion-exchange extractant, and a coordination aid in organic synthesis.
| Item | Specification |
| Melting Point | 39～42 ℃ |
| Boiling Point | 112 °C / 0.5 mmHg (vacuum distillation) |
| Density | 1.12 g/cm³ |
| Flash point | 110 ℃ |
| Refractive index | n₂₀/D: 1.462 |
| Solubility | Easily soluble in water, ethanol, dichloromethane, and aromatic hydrocarbons; insoluble in alkanes. |
| Stability | Stable at room temperature; resistant to weak acids and weak bases; slightly hygroscopic; decomposes easily at high temperatures (mmHg, vacuum distillation). |
Organic synthesis: 18 Crown 6 is used as a highly efficient phase-transfer catalyst to significantly enhance the reaction rates and yields of heterogeneous organic reactions
Separation and purification: 18 Crown 6 ether is used as a metal ion complexing agent for the extraction and separation of alkali metal and alkaline earth metal ions
Analytical chemistry: Used as an ion-selective carrier for ion detection, electrochemical analysis, and chromatographic separation
Materials Science: Serves as a templating agent and coordinating reagent for the synthesis of functional materials such as molecular sieves and crystalline materials
Pharmaceutical and Chemical Engineering: Used as a coordinating auxiliary agent for drug molecule modification and the synthesis of specialized organic drugs
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