Amazon lists it as having "Clear nontoxic, FDA and NSF listed compounds."
http://www.amazon.com/Watts-SVGE10-Pre-Cut-Diameter-10-Foot/dp/B000HE5DUG/ref=sr_1_1?ie=UTF8&qid=1442441867&sr=8-1&keywords=vinyl+tube

EDIT: that tube I got (above) might not be food grade as pointed out by other redditors, so you might wanna look for another option if you're worried.

EDIT 2: Found the spec sheet. It is recommended for dispensing beverages and potable water, and the compounds are indeed non-toxic. I guess I'm sticking with this tube.
http://media.wattswater.com/ES-ClearVinyltubing.pdf