Nitarate ya potasiyumu (KNO₃), izwi kandi nka nitiri. Ni ikoresha ogisijeni gikomeye gikoreshwa muri baruti y'umukara (75 % ya KNO₃, 15 % y'amakara, 10 % ya sufuru), mu kubika inyama, mu ifumbire no mu bicanwa by'imyidagaduro. Mu mateka yakusanyirizwaga mu myanda y'utubuto, mu birundo by'imborera cyangwa mu butaka bukungahaye kuri nitarate mu buvumo no mu byumba by'amatungo.