4-Chlorophenol is a halogenated phenol derivative and the building block of various pharmaceutical goods.P-chlorophenol is mainly used in pesticide, medicine, dyes, plastics and other industries. It is also used as ethanol discoloration agent, selective solvent for refining mineral oil and microscopic analysis. Phenol is an important raw material for the production of some Chemicalbook resins, fungicides, preservatives, and drugs such as aspirin. It can also be used for disinfecting surgical instruments and excrement treatment, skin sterilization, antipruritic and otitis media.