Used as a phase transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases by transferring reactants across interfaces. Commonly employed in the preparation of fine chemicals, pharmaceuticals, and agrochemicals where efficient mixing of aqueous and organic phases is required. Also utilized in the synthesis of zeolites and mesoporous materials as a structure-directing agent, helping to control pore size and framework morphology. In analytical chemistry, it serves as a mobile phase additive in liquid chromatography to improve peak resolution. Additionally, applied in surface treatment processes for semiconductors and electronic materials due to its ability to provide controlled alkaline conditions.