On January 14, the market price of phthalic anhydride in Jiangsu region remained strong and stable. The mainstream negotiation price for ortho-xylene-based products was between 6,100 and 6,350 yuan/ton, while the mainstream negotiation price for naphthalene-based products ranged from 5,700 to 6,050 yuan/ton. The operating rate of phthalic anhydride plants decreased due to reduced equipment utilization, resulting in a decline in overall production. Despite sufficient spot supply in the domestic phthalic anhydride market, the cost pressure increased as the price of raw material ortho-xylene fluctuated upward, and the price of industrial naphthalene remained firm. Downstream, the plasticizer market showed strong consolidation, with plasticizer enterprises operating at reduced capacity. However, demand support for phthalic anhydride persisted, driven by rigid downstream procurement. Looking ahead, the phthalic anhydride market is expected to maintain a strong consolidation trend.