On January 8, the business-to-business price ratio index for isooctanol and DOP was 110.71, an increase of 0.79 points from the previous day. Compared to the cycle's highest point of 147.70 (February 7, 2022), it decreased by 25.04%, while it rose by 20.68% compared to the cycle's lowest point of 91.74 (November 3, 2015). (Note: The cycle refers to the period from January 1, 2012, to the present). Isooctanol prices fluctuated with an upward trend, DOP prices increased, and the downward pressure on DOP weakened while upward momentum strengthened.

On January 8, the business-to-business price ratio index for phthalic anhydride and DOP was 88.54, unchanged from the previous day. Compared to the cycle's highest point of 113.13 (October 16, 2022), it decreased by 21.74%, while it rose by 96.02% compared to the cycle's lowest point of 45.17 (July 27, 2021). (Note: The cycle refers to the period from January 1, 2012, to the present). Phthalic anhydride prices fluctuated with an upward trend, DOP prices fluctuated with an upward trend, and the upward momentum for DOP strengthened while downward pressure weakened.

On January 9, the DOP market in Jiangsu showed strong consolidation, with quotations at 7,400 yuan per ton. In Shandong, the DOP market also exhibited strong consolidation, with quotations at 7,250 yuan per ton. In Zhejiang, the DOP market showed strong consolidation, with quotations at 7,500 yuan per ton.

On January 9, the price of phthalic anhydride, a raw material for DOP, fluctuated with an upward trend, and isooctanol prices also fluctuated with an upward trend. The cost of DOP raw materials increased significantly, while DOP production capacity declined. Downstream market conditions were average, with demand primarily driven by rigid needs. Downstream customers' purchasing willingness was moderate, and transaction prices were subject to negotiation. DOP quotations ranged from 7,250 to 7,500 yuan per ton, showing strong consolidation. Actual transaction prices increased, with favorable factors for DOP strengthening and unfavorable factors weakening, leading to a strong consolidation in the DOP market.