On January 15, the business-to-business price ratio index for isooctanol and DOP was 110.25, down 0.86 points from the previous day. Compared to the cycle's highest point of 147.70 (February 7, 2022), it decreased by 25.36%, while it increased by 20.18% from the lowest point of 91.74 (November 3, 2015). (Note: The cycle refers to the period from January 1, 2012, to the present.) Isooctanol prices remained strong with consolidation, while DOP prices rose. The downward pressure on DOP weakened, but upward momentum persisted.

On January 15, the business-to-business price ratio index for phthalic anhydride and DOP was 91.14, down 0.72 points from the previous day. Compared to the cycle's highest point of 113.13 (October 16, 2022), it decreased by 19.44%, while it increased by 101.77% from the 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, and DOP prices also rose with fluctuations. The upward momentum for DOP persisted, while downward pressure weakened.

On January 16, the DOP market in Jiangsu remained stable, with quotations at 7,500 yuan/ton. In Shandong, the DOP market also remained stable, with quotations at 7,350 yuan/ton. In Zhejiang, DOP prices were stable, with quotations at 7,600 yuan/ton.

On January 16, the price of phthalic anhydride, a raw material for DOP, fluctuated with an upward trend, and isooctanol prices also rose with fluctuations. The cost of DOP raw materials increased, 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 negotiated on a case-by-case basis. DOP quotations ranged from 7,400 to 7,600 yuan/ton, showing an upward fluctuation trend. Actual transaction prices rose, with increased positive factors and reduced negative factors for DOP. Overall, DOP prices fluctuated with an upward trend.