Zheng's alcohol is methanol. Zhengchun mentioned in futures actually refers to methanol, which is also called "Zhengchun" because it is listed and traded in Zhengshang Stock Exchange. Simply put, the former is used for trading, and the latter is a physical futures variety.

Methanol, also known as wood essence and wood alcohol, is a colorless and slightly fragrant volatile liquid with a boiling point of 64.5-64.7℃. It is soluble in water, toxic and flammable, and its vapor can form an explosive mixture with air. Methanol is one of the important chemicals produced by syngas, which is not only an important chemical raw material, but also a fuel.