Used primarily as a chemical intermediate in the synthesis of other specialty compounds, particularly in the production of dyes, pharmaceuticals, and agrochemicals. It serves as a building block in organic reactions where chlorinated methyl groups are needed for further functionalization. Due to its reactivity, it is also employed in cross-linking agents and polymer modifiers to enhance thermal and chemical resistance in certain resins. Its high chlorine content makes it useful in flame retardant formulations, although such applications are limited due to environmental and stability concerns. Handling requires caution because of its potential to release corrosive or toxic byproducts under heat or hydrolysis conditions.