Usage :      1)   Used as Leather tanning agent, catalyzer, disinfector in leather industry, serves as camouflage salt in the chrome tanning method. 2)   Used in catalyst and stabilizer compositions, and in the printing and dyeing of textiles as a reducing agent. 3)   Used as the raw material in the manufacturers of sodium hydrosulphite, formic acid and oxalic acid. 4)   Used in completion fluid in oil field, drilling fluids. 5)   Used as anti-frosting agent in concrete. Packing :   In 25 kg or 50kgplastic woven bag lined with PE bag net each.