Ethanol is a type of alcohol and the main component of wine. It is also commonly known as alcohol and liquor. It is neutral. Ethanol is flammable and is a commonly used fuel, solvent and disinfectant. It is also used in organic synthesis. Industrial alcohol contains a small amount of toxic methanol. Medical alcohol mainly refers to ethanol with a volume percentage concentration of about 75% (or a mass percentage concentration of 70%), and also includes other concentrations of alcohol widely used in medicine.