On January 12, the phthalic anhydride unit at Changzhou Xinyang has a capacity of 100,000 tons, with the plant's operating rate below 50%. Inventory is low, and the phthalic anhydride quotation is 6,250 yuan/ton, up by 150 yuan/ton. PriceSeek analysis of phthalic anhydride, bullish-bearish score: 2. The plant's phthalic anhydride unit operating rate is below 50%, coupled with low inventory, leading to a significant tightening of supply, driving the spot quotation up by 150 yuan/ton to 6,250 yuan/ton. This supply-demand imbalance directly reflects the tight market structure, and it is expected that spot prices will continue to rise in the short term, constituting a significant positive factor for phthalic anhydride prices.