There are currently in sale 2 types of antifreeze:
Antifreeze on the basis of Mono Ethylene Glycol (MEG) is toxic and should be handled with care. It's mostly used in cars and cooling systems. This antifreeze has a problem with disposal after its utilization.
Antifreeze on the basis of Mini Propylene Glycol (MPG) is eco-friendly antifreeze and must be used in: Pharmaceutical and Food industry and is commonly used in Construction industry for: central heating, solar systems or solar panels.