1. It is an important raw material for the manufacture of polyester resin, film, fiber, insulating paint and engineering plastics.

2. Most of this product is used to produce polyethylene terephthalate (polyester), which is an important raw material for polyester fiber, film, plastic products, insulating paint and plasticizer. It is also used in the production of medicine, dyes and other products.

3. Used as a chromatographic analysis reagent.

4. Used to manufacture synthetic resins, acid fibers and plasticizers.

5. Organic synthesis, determination of residual alkalinity of wool, gas chromatography sweeping agent. Adding to polyethylene glycol 200 can separate and analyze fatty acids.