The current supply of phthalic anhydride in China is tight, with major producers continuously raising their quotes, and the spot transaction prices are also increasing. Based on the average difference indicator, the current price of phthalic anhydride is in a volatile retracement (bullish) pattern, with the price at a high level over multiple periods including the past 1 year, 3 months, and 60 days. The upside potential is limited, but the tight balance between supply and demand provides strong support for the spot price.
I. Table of Mean Difference Changes
| Mean Difference Indicator | Today (2026.09.16) Value | Yesterday (2026.09.15) Value | Direction of Change |
|---|---|---|---|
| 5-day Mean Difference (D5) | 86.66 | 50 | + |
| 10-day Mean Difference (D10) | 206.67 | 251.67 | - |
| 20-day Mean Difference (D20) | 253.33 | 220 | + |
- Note: The latest available data is up to September 16, 2026. It is recommended to refer to real-time data.
II. Signal State Determination
The current three mean difference change direction combinations are (+, -, +), which align with the retracement (bullish bias) signal under a consolidation pattern in China.
III. Trend Direction Conclusions
The current price trend is oscillating (with a bullish bias). Reason: The changes in the 5-day, 10-day, and 20-day moving average differences from the previous day are not entirely consistent, which does not meet the criteria for a clear uptrend or downtrend. This indicates an oscillating range, with retracement signals suggesting a bullish bias and potential for further upward momentum.
4. Spatial Reference
Phthalic anhydride prices are in the 5th tier (the highest 20% range, at a high level) of the 60-day, 3-month, and 1-year cycles, with limited room for further increases.
V. Spot Dynamics of Major Production Enterprises in China
Tongling Chemical Industry Group: Phthalic anhydride capacity is 80,000 tons. The o-xylene phthalic anhydride plant is operating normally. On September 14, 2026, the quoted price was 10,200 CNY/ton, an increase of 200 CNY/ton from September 11. Supply is tight, and sales are limited; the actual transaction price has also risen accordingly.
Shijiazhuang Bailong Chemical Co., Ltd.: Phthalic anhydride capacity is 80,000 tons, the plant is operating normally, with limited inventory mainly for internal use. On September 14, 2026, the quoted price was 10,200 CNY/ton, an increase of 200 CNY/ton. The actual transaction price has risen, and specific orders can be discussed in detail.
6. Upstream and Downstream Conditions of the Industry Chain
Upstream products: Pure naphthalene, OX
Downstream products: Metolachlor, Imidacloprid, Captan, phthalate-based plasticizers, unsaturated resins, alkyd resins, and others.
7. 1-Year Price Trend Chart
VIII. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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