Pharmaceutical companies will use some organic solvents with low melting point and good volatility. Such as benzene series, organic amine, ethyl acetate, dichloromethane, acetone, methanol, ethanol, butanone, ether, dichloroethane, acetic acid, chloroform, etc. These solvents are likely to volatilize in the production process, causing pollution and odor. It is suggested to treat them with plant deodorant, which can quickly remove the odor and is a very reasonable odor treatment method.