On January 15, Shandong Zhuohang New Materials (Heze) Co., Ltd. set the ex-factory listed price of propylene glycol at 5,480 yuan per ton, an increase of 100 yuan per ton. PriceSeek analysis of propylene glycol, long-short score: 1. The ex-factory price increase of 100 yuan per ton reflects tight supply or increased demand, directly benefiting the spot market and potentially driving short-term spot price increases. The price adjustment is moderate, indicating a generally positive signal, with a score of +1.