Used primarily in organic synthesis, especially in the preparation of dyes and explosives due to its highly reactive nitro and fluorine groups. It serves as a reagent for introducing nitroaromatic functionalities into larger molecules. Commonly employed in the Sanger method for sequencing amino acids, where it reacts with terminal amino groups of proteins to form stable dinitrophenyl derivatives that can be analyzed. Also utilized in the development of certain pharmaceuticals and agrochemicals as an intermediate. Requires careful handling due to its sensitivity and potential toxicity.