Used as a phase transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by improving solubility and reactivity. Commonly applied in nucleophilic substitutions and ether formations where efficient ion transport is required. Also utilized in the preparation of crown ether analogs for metal ion complexation, especially in analytical chemistry for selective ion extraction and sensing. Its flexible structure enhances binding with alkali metal ions in non-aqueous environments, making it useful in battery electrolyte systems and ion-selective membranes.