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

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

skunkbait8 years ago
I bought mine at the drugstore.
Try various drug stores. Or on the web.
lemonie8 years ago
. 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.