Dimethylphosphinic acid is primarily used as a precursor in the synthesis of various organophosphorus compounds. It plays a significant role in the production of flame retardants, which are incorporated into polymers and textiles to enhance their fire resistance. Additionally, it is utilized in the development of ligands for metal complexation, particularly in catalysis and material science applications. The compound also finds use in organic synthesis as an intermediate for creating specialized chemicals, including pharmaceuticals and agrochemicals. Its ability to modify surface properties makes it valuable in coatings and surface treatment technologies.