Fluids Mixing Table Testing Where to Get More Help Pollution Prevention for Vehicle Maintenance Antifreeze Antifreeze is most commonly composed of ethylene glycol, with corrosion inhibitors and foam controllers added.
Some antifreeze is composed of propylene glycol because it is less toxic to humans and animals.
During use, antifreeze can pick up contaminants. If dissolved metal levels, such as lead or cadmium, are high enough, used antifreeze may be a hazardous waste. Do When good antifreeze must be removed for repairs only, save it and return it to the system after the repairs have been completed. Separate spent antifreeze from other wastes. If on-site recycling is not feasible, recycle your antifreeze through a recycling service.