Chempricehub, June 11 – On June 11, Zhongboron (Shandong) Chemical Technology Co., Ltd. quoted the ex-factory price of agricultural-grade potassium nitrate at 4,300 RMB/ton, a decrease of 300 RMB/ton from the previous quotation. The company has an annual production capacity of 50,000 tons of potassium nitrate.