Aerosol cans contain liquid or gas propellant packed under pressure. Full or partially full cans may explode if crushed, punctured, or exposed to heat.
Aerosols of hazardous materials
Empty aerosols of hazardous materials must be put into household trash and NOT recycled.
Non-hazardous aerosols
Non-hazardous aerosol cans (such as those containing beauty, food, and laundry products) can be put into the trash or scrap metal box.
Do not puncture, pierce, flatten the can, or remove the nozzle before disposal.