Potassium nitrate (KNO 3), known historically as saltpeter or the mineral niter, is a common salt with multiple uses.It has been known since antiquity; an early appearance in the chemical literature ...

They took him to a traditional healer, who told the 14-year-old to take a tablespoon of kalmi shora, a potassium nitrate salt, meant to treat kidney stones, doctors said.

They took him to a traditional healer, who told the 14-year-old to take a tablespoon of kalmi shora, a potassium nitrate salt, meant to treat kidney stones, doctors said.

They took him to a traditional healer, who told the 14-year-old to take a tablespoon of kalmi shora, a potassium nitrate salt, meant to treat kidney stones, doctors said.