I don't think I
can read the back there (no image)... but interestingly enough just the other day, when I was at Lowes, I checked the packaging on the Miracle Gro perlite they had (which I am certain is the exact same 8 quart bag). On the front of the bag (which you can see in the Amazon image), in yellow\English, it says: "Improves Drainage & Aeration in potting mixes -
Enriched with MIRACLE-GRO® plant food". Then on the back of the bag, lower left hand corner, it details the NPK and states "Derived from: ammonium nitrate, ammonium phosphate, calcium phosphate, and potassium sulfate."
Here is the packaging:
http://www.scotts.com/smg/products/Miracle-Gro/soil/in_container/pdf/Miracle-Gro Perlite.pdf
Maybe they do sell it without the crap, but that other stuff in the first link definitely has it.