Used as a source of fluoride ions in organic synthesis, particularly in nucleophilic fluorination reactions where it facilitates the replacement of leaving groups with fluorine atoms. Commonly applied in the preparation of fluorinated pharmaceuticals and agrochemicals due to its ability to introduce fluorine into aromatic and aliphatic compounds. Employed in glass etching and metal surface treatment processes where controlled fluoride release is required. Also utilized in analytical chemistry for the decomposition of silicates and in some cases as a catalyst or reagent in polymerization reactions. Its aqueous form allows for easy handling and dosing in industrial and laboratory settings.