On January 8, Panjin Rui De Chemical Co., Ltd. had a phthalic anhydride (PA) production capacity of 100,000 tons. The ortho-xylene-based PA equipment was shut down, while the naphthalene-based PA equipment was operating normally. With limited inventory, the sales quota for this week was sold out, and PA was temporarily not offered for external sales. PriceSeek analysis of PA, with a bullish-bearish score of 1.5, indicates that the shutdown of the ortho-xylene-based PA equipment at Panjin Rui De Chemical Co., Ltd., combined with the normal operation of the naphthalene-based PA equipment, has led to overall capacity constraints. Limited inventory and the sold-out sales quota for the week have resulted in a temporary suspension of PA quotations. This reflects tightness on the supply side, as the equipment shutdown has reduced partial production, while insufficient inventory and the sales suspension indicate market shortages, which may drive up spot prices. Although the demand side is not directly mentioned, the sold-out status suggests robust or better-than-expected demand. Overall, the supply contraction significantly benefits PA spot prices, but since it is not a complete shutdown (naphthalene-based equipment remains operational), the score is moderately bullish.