On January 13, Changzhou Xinyang's phthalic anhydride plant, with a capacity of 100,000 tons, operated at less than 50% utilization. The manufacturer's phthalic anhydride inventory remained low, and the quoted price was 6,350 yuan/ton, up by 100 yuan/ton. PriceSeek analysis of phthalic anhydride, with a bullish-bearish score of 1: Changzhou Xinyang's phthalic anhydride plant operating at less than 50% utilization and low inventory indicate tight supply. The price increase of 100 yuan/ton to 6,350 yuan/ton reflects an imbalance between supply and demand in the spot market, supporting upward price movement. Supply constraints may drive up spot prices, and the market is expected to remain strong in the short term.