Can be used as a solvent. It can be used as a catalyst for manufacturing polyurethane foam plastics in combination with organotin compounds. It can be used as a catalyst for the production of polycarbonate by phosgene method, a polymerization inhibitor for tetrafluoroethylene, a rubber vulcanization accelerator, a special solvent for paint stripping agents, surfactants, ion exchange resins, preservatives, fungicides, dyes, fragrances, enamel anti hardening agents, pharmaceuticals, high-energy raw materials, liquid rocket propellants, etc.