Today, the phthalic anhydride prices in China continued to rise. Mainstream manufacturers, with low inventory and tight supply, have generally increased their quotes. According to the average difference analysis system, the current phthalic anhydride prices are in a clear upward trend. However, the prices are already at a high level over the past year, and the subsequent upward space will need to closely monitor the strength of downstream demand.
I. Table of Mean Difference Changes
| Mean Difference Indicator | Value as of September 10, 2026 | Value as of September 9, 2026 | Direction of Change |
|---|---|---|---|
| 5-day Mean Difference (D5) | 253.34 | 213.34 | + |
| 10-day Mean Difference (D10) | 81.66 | 51.66 | + |
| 20-day Mean Difference (D20) | 83.34 | 65.83 | + |
Note: The latest available data is up to September 10, 2026. It is recommended to refer to real-time data.
II. Signal State Determination
Three uniform differences are completely consistent in direction and all positive, indicating a clear upward signal.
III. Trend Direction Conclusions
The current trend in phthalic anhydride prices in China is clearly upward. The basis for this judgment is that the changes in the 5-day, 10-day, and 20-day average differences compared to the previous day are all positive, and all three average difference values are positive, fully meeting the criteria for a clear upward trend according to the average difference method.
4. Spatial Reference
Phthalic anhydride 60-day, 3-month, and 1-year cycle prices are all in the 5th tier (high price range), with limited room for further increases, and there is a need to be cautious of the risk of a pullback from these high levels.
V. Trend Chart Display
VI. Spot Market Dynamics
Tongling Chemical Industry Group: Phthalic anhydride capacity 80,000 tons, the o-xylene phthalic anhydride plant is operating normally. The quotation on September 10 was 9,800 CNY/ton, with the quotation and actual transaction price increasing. Supply is tight, and sales are limited.
Shijiazhuang Bailong Chemical Co., Ltd.: Phthalic anhydride capacity is 80,000 tons, the plant is operating normally, inventory is limited and mainly for internal use. The quotation on September 10 was 10,000 CNY/ton, with a significant increase in price.
Changzhou Xinyang: Phthalic anhydride plant capacity is 100,000 tons, with an operating rate of around 60%, and inventory is low. On September 10, the quoted price was 9,950 CNY/ton, with a significant increase in the quote, and orders are being accepted on a limited basis.
VII. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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