Used primarily as a chemical intermediate in organic synthesis, especially in the production of polymers and polyamides. It serves as a building block for creating long-chain aliphatic polyesters and polyurethanes due to its eight-carbon diacid chloride structure, which enables strong intermolecular interactions. Commonly employed in step-growth polymerization reactions where it reacts with diamines to form nylon-like materials. Also utilized in pharmaceutical synthesis for constructing carbonyl-containing compounds, and in specialty coatings and adhesives requiring high thermal and chemical resistance. Its high reactivity requires careful handling in anhydrous conditions.