For anyone who uses stump remover granules for the potassium nitrate content. Hi Yield has changed the formula and does not contain potassium nitrate anymore. So don't use it to treat cartridge paper or make fuses or for any other flamable use. I made up some stuff and it won't even burn, much less light quickly and easily. Amazon has very pure product for a good price and free shipping. Actually quite a bit cheaper than stump remover.