Used as a structure-directing agent (template) in the synthesis of zeolites and microporous materials, such as ZSM-5 and Beta zeolite, facilitating the formation of uniform pore structures essential for catalysts and molecular sieves in the chemical industry.

Also employed as a phase transfer catalyst in organic synthesis, enabling reactions between compounds in different phases by transferring reactants across interfaces. Commonly used in the preparation of fine chemicals and pharmaceuticals requiring selective and efficient reaction conditions.

Serves as a strong base in laboratory applications for extractions, hydrolysis of esters, silylation, and other base-catalyzed reactions.

Utilized in electrochemical applications, such as electrolyte components in batteries and fuel cells, due to its good ionic conductivity.

In analytical chemistry, acts as a mobile phase additive in liquid chromatography, particularly in ion-pair chromatography to enhance separation of ionic compounds.

Additionally, applied in surface treatment processes to modify silica and other oxide surfaces, improving dispersion stability in colloidal systems and nanomaterials preparation.