On February 9, the Business Society's Isooctanol-to-DOP Commodity Price Ratio Index stood at 108.98, a decrease of 3.53 points from the previous day. Compared to the cycle's peak of 147.70 points (recorded on February 7, 2022), it declined by 26.22%, while it rose by 18.79% 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.) Isooctanol prices fluctuated and declined, while DOP prices also fluctuated and declined, with DOP facing continued downward pressure and weakened upward momentum.

On February 9, the Business Society's Phthalic Anhydride-to-DOP Commodity Price Ratio Index was 85.61, an increase of 0.73 points from the previous day. Compared to the cycle's peak of 113.13 points (recorded on October 16, 2022), it declined by 24.33%, while it rose by 89.53% 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 declined, while DOP prices also fluctuated and declined, with DOP experiencing weakened upward momentum and continued downward pressure.

On February 10, the DOP market in Jiangsu Province remained weak and stable, with quotations at 7,700 yuan/ton. In Shandong Province, the DOP market trended weakly downward, with quotations at 7,400 yuan/ton. In Zhejiang Province, the DOP market remained weak and stable, with quotations at 7,800 yuan/ton.

On February 10, the raw material phthalic anhydride for DOP remained weak and stable, while isooctanol prices trended weakly downward. DOP raw material costs weakened and declined, DOP production capacity decreased, downstream demand remained moderate, downstream customers maintained rigid demand, and purchasing willingness was generally subdued. Transaction prices were negotiated on a case-by-case basis. DOP quotations ranged from 7,400 to 7,800 yuan/ton, showing a weak downward trend. Actual transaction prices also trended weakly downward. The bullish factors for DOP weakened, while bearish factors intensified, leading to a weak downward trend in the DOP market.