Organic solvents are widely used in life and production of organic compounds, molecular weight is small, liquid at room temperature. Organic solvents include many kinds of substances, such as alkanes, olefins, alcohols, aldehydes, amines, esters, ethers, ketones, aromatic hydrocarbons, hydrogenated hydrocarbons, terpene olefins, halogenated hydrocarbons, heterocyclic compounds, nitrogenous compounds and sulfur-containing compound, etc., most of which have certain toxicity to human body.