On August 11, 2026, the phthalic anhydride market prices in China continued to decline. The average difference indicator showed a clear downward signal, with prices in the higher range of a 1-year cycle. Additionally, major manufacturers generally reduced their quotes by 50-100 CNY per ton, indicating sustained downward pressure on the market in the short term.
I. Table of Mean Difference Changes
| Mean Difference Type | Today's Value (2026-08-11) | Yesterday's Value (2026-08-10) | Direction of Change |
|---|---|---|---|
| 5-day Mean Difference (D5) | -65.01 | -26.67 | - |
| 10-day Mean Difference (D10) | -68.33 | -63.33 | - |
| 20-day Mean Difference (D20) | -47.5 | -11.67 | - |
II. Signal State Determination
The changes in the three moving averages (5-day, 10-day, and 20-day) compared to the previous day are all negative, indicating a clear downward signal.
III. Trend Direction Conclusions
The price trend of phthalic anhydride is clearly declining, with the reasons being: the 5-day, 10-day, and 20-day average differences compared to yesterday are all negative, and the directions of the three are completely consistent, meeting the criteria for a clear decline as determined by the average difference method; at the same time, the mainstream manufacturers in China have generally reduced their quotations by 50-100 CNY per ton, and the spot market price trends corroborate the signals from the average differences.
4. Spatial Reference
Phthalic anhydride prices are in the mid-high range of the 1-year price cycle. According to the five-tier position classification rule, being in the mid-high range suggests limited room for further increases, but there is some potential for a short-term decline.
V. Trend Chart Display
VI. Spot Market Dynamics
2026-08-11, Tongling Chemical Industry Group's phthalic anhydride unit resumed operations, with a quote of 9,000 CNY/ton, a decrease of 100 CNY/ton from the previous day, with small volume sales; Changzhou Xinyang's phthalic anhydride facility utilization rate is around 50%, with low inventory, and the quote is 9,100 CNY/ton, a decrease of 50 CNY/ton from the previous day.
2026-08-10, Shijiazhuang Bailong Chemical's phthalic anhydride plant is operating normally, with limited inventory, and the price is 9,000 CNY/ton, down 100 CNY/ton; Zhenjiang Liancheng Chemical's phthalic anhydride plant is also operating normally, with a price of 9,000 CNY/ton, down 100 CNY/ton.
Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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