If you're using 95% ethanol, you're using just about the best stuff you can. The reason it's marked as toxic is that it's been denatured... basically, they don't want people drinking it, so they put poisins in. Government couldn't get tax revenue from the stuff if it wasn't sold as an alcoholic beverage. Weird logic, but... 95% Everclear, if available in your state, is the "purest" stuff, but pricey.
Edit: Good call by George above... even burning Everclear, IIRC, has formeldahyde as one of the by-products. Burning any fuel can release stuff you don't want to go out of your way to ingest, but the 95% etoh is arguably about the "cleanest" you'll find.