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is it possible to obtain pure concentrated kno3(potassium nitrate) in the us,legally? Answered

im making,well trying to make high power two stage rockets and need pure kno3

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I bought mine at the drugstore.

Try various drug stores. Or on the web.

. And that doesn't include all the numerous misspellings.
. I like Potassium Permanganate (KMnO4) better. ;) Used the stuff to regenerate Iron (in water) filters feeding a distillation column.