... K2O )46.0% minNITROGEN13.0% minMOISTURE0.1% maxWATER INSOLUBLES0.02% maxSUIPHATE (as SO4)0.01% maxCHLORIDE (as Cl)0.03% maxIRON(as Fe)0.002% maxNITRITES0 ... .01% maxHEAVY METAL (as Pb)0.001 ... , Toothpaste, Denitrifies, eat Curing, Cheese, rocket propellants potassium nitrate 13-0-46