Yes, all aerosol cans are considered hazardous waste by the Environmental Protection Agency (EPA). As such, they must be given to EHS for proper disposal and never thrown into the regular trash. Aerosol cans contain a chemical component under greater than atmospheric pressure that is often sprayed using the propellants butane or propane. Examples of aerosol cans include duster, which is used to remove dust from electronics, lubricants such as WD40, and spray paint cans.