Specification:Industrial Grade(GB/T 1918-1998) Inspection Items Unit Industrial Grade First Grade Agricultural Grade Purity %MIN 99.8 99.4 97.5 Moisture %MAX 0.10 0.10Chloride(asCL-) %MAX 0.01-0.03 0.02 0.8 Sulphate(as SO4-) %MAX 0.01 0.01Insoluble Matter in Water %MAX 0.01 0.02FE %MAX 0.003Hygroscopicity %MAX 0.25 0.30K2O %MIN46 Nitrogen(in nitrate) %MIN13.5 Particle Size MM 0.2-2.5 2-5Wentong Group, following the deepening and 2006, Qinghai Salt Lake Industry Group's strategic cooperation, in Qinghai, some 20 tons of agricultural potassium nitrate project, which will be fully operational in 2010, our company's "granular potassium nitrate," fill the gaps, won the Shanxi Provincial Science and Technology Progress Award, "the production of potassium nitrate ion exchange," the first prize, and through the IS09001-2000 international quality system certification, I take potassium nitrate with high purity and low iron content, less water features, especially for in glass, fireworks, agriculture, tobacco farming and other industries, welcome customers to our company inquiry ..