Used as a source of fluoride in organic synthesis, particularly in nucleophilic fluorination reactions where it replaces chlorine, bromine, or other leaving groups with fluorine. Commonly employed in the preparation of fluoroaromatic compounds and fluorinated pharmaceuticals. Acts as a catalyst or reagent in the synthesis of fluoroalkyl compounds due to its strong basicity and nucleophilicity. Also utilized in the glass etching industry, ceramics for improving properties such as heat resistance and corrosion resistance, and in certain metal treatment processes where a non-aqueous fluoride source is required. Its anhydrous form is preferred in moisture-sensitive reactions to prevent hydrolysis or side reactions.