Hafnocene dichloride is primarily used as a catalyst in polymerization reactions, particularly in the production of polyolefins. It is effective in facilitating the formation of high-molecular-weight polymers with controlled structures, making it valuable in the plastics industry. Additionally, it is employed in organic synthesis as a precursor for other hafnium-based compounds, which are utilized in various chemical processes. Its role in catalysis also extends to the development of advanced materials, including ceramics and coatings, where precise control over molecular architecture is essential.