Potassium Nitrate in Powder Form is a natural occurring mineral source of nitrogen. Potassium Nitrate can be used as a fertilizer to provide the soil ample amount of nitrogen. Potassium Nitrate is offered in white coloured powdered form and provides the soil ample amount of nitrogen. Potassium Nitrate in Powder Form is formulated using 13.9%, 0%, and 45% of nitrogen, phosphorus and potassium by mass.