Used as a fluorinated coupling agent in surface modification to impart water and oil repellency on materials. Commonly applied in coatings for textiles, paper, and electronics to enhance stain resistance and durability. Also utilized in the synthesis of specialty fluorochemicals for pharmaceuticals and agrochemicals due to its reactive iodine end group, enabling further chemical transformations. Its long perfluorinated chain provides strong hydrophobic and lipophobic properties, making it valuable in creating non-wetting surfaces.