On August 5, the price ratio index between isooctanol and DOP, as tracked by SunSirs, stood at 103.99 points. This represents a decrease of 0.3 points from the previous day, a drop of 29.59% from the cycle high of 147.70 points (recorded on February 7, 2022), and a rise of 13.35% from the cycle low of 91.74 points (recorded on November 3, 2015). (Note: The cycle spans from January 1, 2012, to the present.) Both isooctanol and DOP prices are consolidating at high levels; while downward pressure on DOP prices has eased, upward momentum remains.

On August 5, the price ratio index between phthalic anhydride and DOP (tracked by SunSirs) stood at 113.52 points. This represents a decrease of 0.73 points from the previous day and a 0.98% drop from the period high of 114.64 points (recorded on August 2, 2026), while marking a 151.32% increase from the period low of 45.17 points (recorded on July 27, 2021). (Note: The tracking period spans from January 1, 2012, to the present.) Currently, phthalic anhydride prices are consolidating with a weak trend, whereas DOP prices are consolidating with a strong trend; DOP retains upward momentum, and downward pressure has eased.

On August 6, the DOP market in the Jiangsu region saw a strong consolidation, with quotes at 8,750 RMB/ton. The DOP market in Shandong also experienced strong consolidation, quoted at 8,600 RMB/ton, while the market in Zhejiang showed strong stability, with quotes at 8,800 RMB/ton.

On August 6, the market for phthalic anhydride (a DOP raw material) declined, while isooctanol prices rose, driving up DOP production costs. DOP manufacturers increased operating rates amidst a sluggish downstream market driven primarily by essential demand; however, purchasing interest among downstream customers improved. Transaction prices were determined through negotiation, with DOP quotes ranging from 8,600 to 8,800 RMB/ton. While quotes showed a trend of consolidation at high levels, actual transaction prices remained stable. Overall, the DOP market faces a mix of bullish and bearish factors, resulting in a trend of consolidation at a strong level.

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