How is "RV" antifreeze different from regular antifreeze?

It doesn’t have the poison regular anti-freeze does.
ARE_you_kidding_me will undoubtedly provide you with a more scientific answer I don’t know the exact components ,but it is safe to use in drinking water lines,where regular is not.

It’s the non-toxic stuff used for winterizing and not for the engine. It’s propylene glycol and not ethylene glycol. I think some engines can use it also but I know most engines need it to have special additives regardless of what type. The additives are usually toxic so it’s not safe to assume antifreeze of any type is non-toxic unless it’s specifically marked as such. I just stick to the owner’s manual to the letter when it comes to the stuff. The ethylene variety can be dangerous to people and pets. It’ll eat paint off your motorcycle frame as well…you can guess how I figured that one out. Someone who’s an RVer should really give the answer. I did have to google how to spell propylene and ethylene

Adding to the danger to ethylene glycol – it tastes good to people and pets. It causes all kinds of internal damage, including kidney damage. Oxalate crystals form in the kidney, so ethylene glycol poisoning can be detected during autopsy.