potassium nitrate 13-0-46 Apperance : White Crystal Assay : 99.8% K2O : 46 % Nitrogen as N : 13 Specificationspotassium nitrate Putiry: 99.8%MinK2O: 13.5%min Nitrogen: 46%min ISO9000:2001 certificatepotassium nitrate Formular: KNO3 Spec.:Inspection ItemsUnit Grade Purity%Min99.8Moisture%Max0.10Chloride(as cl-)%Max0.01-0.03Sulphate(as SO42-)%Max0.01Insoluble Matter in Water%Max0.01Fe%Max0. ...