Application: Formic acid is one of the basic organic chemical raw materials, widely used in pesticide, leather, dye, medicine and rubber industries. Formic acid can be directly used in textile processing, tanning, textile printing and dyeing, storage of green feed, as a metal surface treatment agent, rubber additives and industrial solvents. In organic synthesis, it is used to synthesize various formate esters, I acridine dyes and formamide series medical intermediates.