Construction in Shanxi Wentong Group with potassium nitrate, potassium carbonate, and high-grade water-soluble fertilizer products as the core of large-scale manufacturing enterprises - Shanxi Wentong salt bridge compound fertilizer Co., Ltd. Specification:Industrial Grade(GB/T 1587-2000) Inspection Items Unit Fine Grade Technical Grade First Grade Regular Grade Purity %MIN 99.0 99.0 98.5 96.0 Chloride(asKCL) %MAX 0.01 0.03 0.10 0.20 Sulphate(asK2SO4) %MAX 0.01 0.04 0.10 0.15 FE %MAX 0.001 0.001 0.003 0.010 Insoluble Matter in Water %MAX 0.02 0.04 0.05 0.10 Burnt Loss %MAX 0.6 0.8 1.00 1.00 Specification:Food Grade(HG2452-93) Inspection Items Unit Standard Value Purity(as K2CO3) %MIN 99.00 Chloride(as KCL) %MAX 0.01 Sulphate(as K2SO4) %MAX 0.01 FE %MAX 0.001 Insoluble Matter in Water %MAX 0.02 Burnt Loss %MAX 0.6 Arsenic %MAX 0.0003 Heavy Metal(asPb) %MAX 0.002 Wentong Potassium Salt Group is a national inorganic chemical industry, leading enterprises, with 50-year history, the main product potassium carbonate, potassium nitrate, tobacco specialty fertilizer, calcium nitrate, calcium ammonium nitrate, total water-soluble fertilizer, ammonium nitrate, potassium chloride, ammonium, is the world's largest potash producers and the largest manufacturer of potassium nitrate.