Hexane-1,6-diamine dihydrochloride is widely used in the synthesis of polyamides, particularly nylon-6,6, where it serves as a key monomer. It is also employed in the production of adhesives, coatings, and resins due to its ability to enhance durability and chemical resistance. In the pharmaceutical industry, it acts as an intermediate in the synthesis of various drugs and bioactive compounds. Additionally, it is utilized in biochemical research as a crosslinking agent for proteins and nucleic acids, aiding in the study of molecular interactions. Its role in industrial and scientific applications highlights its versatility and importance in material and chemical synthesis.