On January 28, the ChemNet commodity parity index for isooctanol and DOP stood at 115.47, an increase of 2.46 points from the previous day. Compared to the cycle's peak of 147.70 points (recorded on February 7, 2022), it declined by 21.82%, while it rose by 25.87% 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.) The price of isooctanol has increased, and the price of DOP has also risen, with reduced downward pressure and enhanced upward momentum for DOP.

On January 28, the ChemNet commodity parity index for phthalic anhydride and DOP was 86.89, a decrease of 0.27 points from the previous day. Compared to the cycle's peak of 113.13 points (recorded on October 16, 2022), it declined by 23.19%, while it rose by 92.36% 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.) The price of phthalic anhydride fluctuated and consolidated, while the price of DOP fluctuated and rose, with increased upward momentum for DOP, though downward pressure remains.

On January 29, the DOP market in the Jiangsu region showed an upward trend, with quotations at 8,050 yuan/ton. In the Shandong region, the DOP market also rose, with quotations at 7,900 yuan/ton. In the Zhejiang region, DOP prices increased, with quotations at 8,150 yuan/ton.

On January 29, the price of phthalic anhydride, a raw material for DOP, fluctuated and consolidated, while the price of isooctanol fluctuated and rose. The cost of DOP raw materials increased, and DOP production capacity decreased. Downstream market conditions were moderate, with demand primarily driven by immediate needs. Downstream customers showed limited purchasing willingness, and transaction prices were subject to negotiation. DOP quotations ranged from 7,900 to 8,100 yuan/ton, reflecting an increase in both quoted and actual transaction prices. The DOP market exhibited strengthened bullish factors and weakened bearish factors, leading to an overall upward trend.