April 7th — On April 7th, the ex-factory quotation for industrial-grade potassium nitrate from Shanxi Wenshui County Zhenxing Potassium Nitrate Plant was 4,550 yuan/ton, an increase of 50 yuan/ton compared to the previous quotation date. The plant has an annual production capacity of 100,000 tons. Chempricehub analysis of potassium nitrate, long-short score: 1. The ex-factory quotation for potassium nitrate increased by 50 yuan/ton, indicating a possible tightening of supply or increased demand in the spot market, providing favorable support for spot prices. The score is +1 (generally favorable), as the increase is moderate and not driven by major events, but the short-term upward signal strengthens market confidence.