... experienced 2,No packing problem 3,Passed ISO9001-2001 price for potassium nitrateSpecificationFine GradeFirst GradeQualified GradeAgricultural grade(avoid caking)Purity99. ... used to make compound fertilizer, foliar spray fertilizer, especially used for mango, tobacco, fruit tree, rubber. In additional, It is ... transportation. Carefully load and unload in case of crash. price for potassium nitrate