Acetic acid, also known as acetic acid, is a typical fatty acid, colorless liquid and has a strong pungent smell. The melting point of acetic acid is 16.6 ºC, the boiling point is 117.9 ºC, the relative density is 1.0492 (20 / 4 ºC), and the refractive index is 1.3716. Pure acetic acid can form ice like solid when it is below 16.6 ºC, so it is often called glacial acetic acid.

Acetic acid is an important organic chemical raw material, which is mainly used to prepare vinyl acetate monomer (VAM), acetate fiber, acetic anhydride, terephthalic acid, chloroacetic acid, polyvinyl alcohol, acetate and metal acetate. Acetic acid is widely used in many task industries such as basic organic synthesis, medicine, pesticide, printing and dyeing, light textile, food, paint making, adhesive and so on.