On January 12, Tongling Chemical Industry Group has a phthalic anhydride capacity of 80,000 tons. The ortho-xylene-based phthalic anhydride unit is operating normally, while the naphthalene-based phthalic anhydride equipment is temporarily shut down for maintenance. Inventory levels are low, with the ortho-xylene-based phthalic anhydride quoted at 6,300 yuan/ton, showing a significant price increase, and sales are limited. PriceSeek analysis of phthalic anhydride: Bullish-Bearish Score: 1.5. The article indicates that the temporary shutdown for maintenance of Tongling Chemical Industry Group's naphthalene-based phthalic anhydride equipment has led to a reduction in local supply. Low inventory levels, coupled with a significant price increase in ortho-xylene-based phthalic anhydride to 6,300 yuan/ton and limited sales, suggest strong demand. These factors collectively contribute to tight supply in the phthalic anhydride spot market, supporting an increase in spot prices. It is expected that prices will maintain an upward trend in the short term.