Used as a phase transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases by improving reactivity and selectivity. Commonly applied in alkylation, oxidation, and esterification processes. Also serves as an acidic catalyst in various condensation reactions due to its strong proton-donating ability. Its ionic structure makes it suitable for electrochemical applications, including use in dye-sensitized solar cells as an electrolyte component. Additionally, employed in analytical chemistry for the detection and separation of certain anions. Furthermore, used in the production of quinoline-structured dyes, which are important in the textile and cosmetics industries. It can also serve as a starting material in the synthesis of bioactive compounds and certain pharmaceuticals featuring heterocyclic structures that require a positively charged functional group.