Used primarily in specialized chemical synthesis as a source of fluoride ions and as a reagent in the preparation of other fluorinated compounds. It finds application in research settings for the generation of reactive fluorinating agents. Due to its thermal stability and ionic nature, it is sometimes employed in electrochemical systems and molten salt applications. Its use is limited due to the toxicity associated with arsenic, requiring careful handling and disposal. Mainly restricted to laboratory and analytical applications rather than industrial-scale processes.