hydrogen peroxide, chemical formula is H2O2, its aqueous solution is commonly known as hydrogen peroxide, and its appearance is colorless and transparent liquid. It is a strong oxidant, which is suitable for wound disinfection and environmental and food disinfection. 71%-75% alcohol is used for sterilization and disinfection, including skin disinfection, medical instrument disinfection, iodine removal of iodine, etc. Purple liquid medicine is a commonly used disinfectant for skin and mucous membrane in clinic, which has strong bactericidal and astringent effects, but it will also produce many side effects when used improperly < P > The main components of this product are the mixture of tetramethyl parafuchsin aniline chloride, pentamethyl parafuchsin aniline chloride and hexamethyl parafuchsin aniline chloride. The methyl violet solution is 1% solution of ethanol and water.