On January 14, Panjin Ruide Chemical Co., Ltd.'s phthalic anhydride plant has a capacity of 100,000 tons. The operation rate of the phthalic anhydride equipment is low, with limited inventory. The ortho-process phthalic anhydride is quoted at 6,160 yuan/ton. PriceSeek analysis of phthalic anhydride, long-short rating: 1. The article points out that the low operation rate of phthalic anhydride equipment and limited inventory indicate a significant reduction in the supply side, which may drive up spot prices. The current quotation of 6,160 yuan/ton, combined with supply tightness, is favorable for the market and supports price increases. Rating +1 (generally favorable) based on the positive impact of supply constraints on spot prices, but since the demand side is not mentioned, it does not reach a major favorable level.