Evan's NPG-R coolant is propylene glycol base?

I think the NPG-R is ethylene based, but I can't find it at the moment.  I know it still tastes sweet like normal anti-freeze.  Here's the link that tells you how it can save the world :-)

http://www.evanscooling.com/news/npgR.htm

Rusty (I didn't drink too much)