Hazardous Waste Chemical Compatibility is an application that enables users to determine in a simple and comprehensive way the possible hazards that can be expected on hazardous waste storage, based on the chemicals contained in these wastes. This application plays a key role in assessing potential chemical reactions, foreseeing adverse reactions and then enabling handling procedures of hazardous waste to be carried out without risk of unexpected chemical reaction. The application is based on EPA’s Chemical Compatibility Chart (EPA-600/2-80-076 April 1980).