On January 14, the business-to-business price ratio index for iso-octanol and DOP stood at 111.11, unchanged from the previous day. Compared to the cycle's peak of 147.70 points (recorded on February 7, 2022), it decreased by 24.77%, while it increased by 21.11% from the cycle's low of 91.74 points (recorded on November 3, 2015). (Note: The cycle refers to the period from January 1, 2012, to the present.) Iso-octanol prices remained strong and stable, while DOP prices rose, with reduced downward pressure and sustained upward momentum for DOP.

On January 14, the business-to-business price ratio index for phthalic anhydride and DOP was 91.86, unchanged from the previous day. Compared to the cycle's peak of 113.13 points (recorded on October 16, 2022), it decreased by 18.80%, while it increased by 103.37% from the cycle's low of 45.17 points (recorded on July 27, 2021). (Note: The cycle refers to the period from January 1, 2012, to the present.) Phthalic anhydride prices fluctuated and rose, while DOP prices also fluctuated and increased, with sustained upward momentum and reduced downward pressure for DOP.

On January 15, DOP market prices in the Jiangsu region rose, with quotations reaching 7,500 RMB/ton. In the Shandong region, DOP market prices also increased, with quotations at 7,350 RMB/ton. In the Zhejiang region, DOP prices rose, with quotations at 7,600 RMB/ton.

On January 15, the price of DOP raw material phthalic anhydride fluctuated and rose, while iso-octanol prices remained strong and stable. The cost of DOP raw materials increased, and DOP production capacity decreased. 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 7,350 to 7,600 RMB/ton, showing an increase. Actual transaction prices also rose. The DOP market saw strengthened positive factors and weakened negative factors, leading to fluctuating and rising DOP market conditions.