Used primarily as a chemical intermediate in the synthesis of organosilicon compounds. It serves in the production of specialty silanes for surface modification, particularly in creating water-repellent and adhesion-promoting coatings on glass, metals, and ceramics. Its dichlorosilane group readily reacts with hydroxyl surfaces, forming stable siloxane bonds, making it valuable in coupling agents for composites and sealants. Also utilized in the manufacture of silicone polymers with tailored thermal and oxidative stability due to the aromatic methyl group. Common in research and development for functionalizing materials in electronics and coatings industries.