As of September 7, 2026, the average spot price of phthalic anhydride in China was reported at 9,483.33 CNY/ton. According to the mean difference method, the short-term price of phthalic anhydride is showing a resilient and slightly bullish trend with some fluctuations. The current price is at a high level over the past year, and the room for further increases is limited. Relevant industry players can adjust their business strategies based on the dynamics of supply and demand.
Data Description
The most recent available data is up to September 7, 2026. It is recommended to refer to real-time data.
I. Calculation of Mean Deviation Changes
| Mean Difference Indicator | Value as of September 7, 2026 | Value as of September 6, 2026 | Direction of Change |
|---|---|---|---|
| 5-day Mean Difference (D5) | 0 | 16.67 | - |
| 10-day Mean Difference (D10) | 41.66 | 33.33 | + |
| 20-day Mean Difference (D20) | 61.67 | 67.5 | - |
II. Market Signal Identification
Signal Status: The current combination of average difference changes is (－, ＋, －), which belongs to the resilience warning (biased towards bullish) signal.
Trend Direction Conclusion: Range-bound. Reason: The directions of the three average differences compared to the previous day are not entirely consistent, which aligns with the criteria for a range-bound market. The resilience warning signal indicates that the overall trend in China is biased towards the upside.
III. Reference for Price Levels and Upside/Downside Potential
Phthalic anhydride 60-day, 3-month, and 1-year cycle prices are all in the 5th tier (high position), meaning the prices are in the highest 20% range of the cycle, with limited room for further increases.
IV. 1-Year Price Trend Chart
V. Industrial Sector Dynamics
(1) Manufacturer Price Updates (Data as of September 3, 2026)
Zhenjiang Liancheng Chemical Industry Co., Ltd.: Phthalic anhydride capacity 120,000 tons, the plant is operating normally, quoted at 9,500 CNY/ton, up 100 CNY/ton from the previous quote.
Tongling Chemical Industry Group: Phthalic anhydride capacity 80,000 tons, the o-xylene phthalic anhydride unit has resumed operation, with a quoted price of 9,500 CNY/ton, an increase of 100 CNY/ton from the previous quote. Supplies are tight and sales are limited.
Shijiazhuang Bailong Chemical Co., Ltd.: Phthalic anhydride capacity 80,000 tons, the plant is operating normally, with limited inventory mainly for internal use. The quoted price is 9,300 CNY/ton, an increase of 100 CNY/ton from the previous quote.
Changzhou Xinyang: Phthalic anhydride plant capacity 100,000 tons, operating rate around 50%, low inventory, quoted at 9,500 CNY/ton, up 50 CNY/ton from the previous time.
(2) Upstream and Downstream of the Industry Chain
Upstream core raw materials: refined naphthalene and OX; downstream products cover a variety of categories including herbicides such as metolachlor and imidacloprid, ortho-phthalate plasticizers, unsaturated resins, and alkyd resins.
VI. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
(Source: )
