USES: used in leather industry, camouflage acid in chrome tanning process, catalyst and stabilizer, reducing agent in printing and dyeing industry, used in the production of insurance powder, oxalic acid and formic acid. To precipitate noble metals and form complex ions of trivalent metals in solution. It has a buffering effect and can correct for the PH of strong acids. Used in alkyd resin coating, plasticizer, acid-resistant material, aviation lubricating oil, adhesive additive.