On February 10, the market price of phthalic anhydride in East China showed a weak consolidation trend. The mainstream quotation for ortho-xylene-based phthalic anhydride in the market ranged from 6,000 to 6,200 yuan/ton, while the market price for naphthalene-based phthalic anhydride ranged from 5,550 to 5,900 yuan/ton. The price of industrial naphthalene fluctuated and declined, while the price of ortho-xylene stabilized, leading to a decrease in the cost of phthalic anhydride. The downstream plasticizer market experienced fluctuating declines, with plasticizer manufacturers operating at low and stable equipment utilization rates. Downstream demand was primarily driven by rigid procurement, with phthalic anhydride purchases being need-based. The support from phthalic anhydride demand weakened, while the equipment utilization rates of phthalic anhydride manufacturers remained stable. The supply of phthalic anhydride was sufficient, and inventory levels were low. It is expected that the future market for phthalic anhydride will continue to show a weak consolidation trend.