There are also numerous colors of antifreeze - and the color matters. ( Editor’s note: “Nontoxic” propylene glycol antifreeze can still be toxic to children and pets, so please store it out of reach.) This is especially important because antifreeze often has a sweet taste that attracts kids and pets. If you have curious little ones in your household, it’s a good idea to use propylene glycol (often marketed as “nontoxic”) antifreeze instead of ethylene glycol. The chemical base is significant because ethylene glycol is toxic if ingested and propylene glycol is “generally recognized as safe” by the Food and Drug Administration in low doses. Manufacturers typically make antifreeze with either ethylene glycol or propylene glycol. That’s why you may have also heard it called engine coolant, and why it’s important for your car year-round. What Is Antifreeze?Īntifreeze is a water-based additive that lowers the freezing point of the water in your engine and prevents boiling in high temperatures. The good news is that antifreeze is recyclable. What if it’s been sitting there too long? Can you recycle leftover antifreeze? Antifreeze: Wise car owners have some stored in the garage to keep their engines running properly in extreme cold (and hot) conditions.
