Usage：
1) Used as the raw material in the manufacturers of sodium hydrosulphite, formic acid and oxalic acid.
2) Used in completion fluid in oil field, drilling fluids.
3) Used as anti-frosting agent in concrete and used in producing snow-melting agent and de-icing agent.
4) Used as the raw material in feed additive.
5) Used as leather tanning agent, catalyzer, stabilizer in leather industry, serves as camouflage salt in the chrome tanning method.
6) Used in the printing and dyeing of textiles as a reducing agent.
7) Used for alkyd resin coating, plasticizer, acid resistant material, aviation lubricating oil, and adhesive additive.
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