It is the glicoze in antifreeze that reacts with potassium permanganate. So instead of carrying anti-freeze add some glycerine in your first-aid kit or a small amount in your EDC. You get a better result with glycerine instead of antifreeze and you can also use it for personal care.

Antifreeze is very harmful. The taste also is very sweet and attracts animals, if you have a pet be very careful with it they love the taste!

Burak