Commonly used in de-icing products, screen wash and in car engines, antifreeze contains ethylene glycol, a highly toxic substance that can cause severe illness or even death in pets if ingested.

as both have been used in antifreeze due to their low freezing points. However, these are not the same substance. Ethylene glycol is highly toxic to humans and is not used in food products.

They explained that many deicers contain a synthetic liquid called ethylene glycol—which is highly toxic to cats.