As of September 15, 2026, the spot price of phthalic anhydride in China remained at a high level. The average difference indicator shows that the current market is in a mild correction phase. The tight supply from manufacturers and the recent consecutive price increases have provided support to the prices. However, the prices are already at a high point in the nearly one-year cycle, and the room for further increases is limited. Overall, the market is showing a strong but fluctuating trend.
I. Table of Mean Difference Changes
| Average Difference Type | Value as of September 15, 2026 | Value as of September 14, 2026 | Direction of Change |
|---|---|---|---|
| 5-day Average Difference (D5) | 50 | 110 | - |
| 10-day Average Difference (D10) | 251.67 | 260 | - |
| 20-day Average Difference (D20) | 220 | 190 | + |
II. Signal State Determination
The current mean difference change symbol combination is (－, －, ＋), which belongs to a mild correction (biased bearish, corrective nature) signal.
III. Trend Direction Conclusions
The current phthalic anhydride price trend is fluctuating. Reason: The changes in the 5-day, 10-day, and 20-day average differences from the previous day are not completely consistent, not meeting the criteria for a clear upward/downward trend, thus remaining in a fluctuation range. The current phase is a mild correction with a bearish attribute.
4. Spatial Reference
Phthalic anhydride 60-day, 3-month, and 1-year cycle prices are all at high levels, corresponding to the 5th tier in the 5-tier price classification, with limited room for further increases.
V. Price Trend Over the Past Year
VI. Reference to the Spot Market Fundamentals
Recently, the operating rates of phthalic anhydride production facilities in China have been stable overall, but inventories are generally low, leading to tight supply. From September 10 to 14, major companies such as Tongling Chemical Industry Group and Shijiazhuang Bailong Chemical continuously raised their phthalic anhydride quotes, with a cumulative price increase of 400 CNY per ton. The actual transaction prices also increased accordingly, and some manufacturers have adopted strategies of limited sales and prioritizing internal use.
VII. Data Explanation and Risk Warning
Data note: The latest available data is up to September 15, 2026. It is recommended to refer to real-time data.
Risk warning: The above analysis is for reference only and does not constitute trading advice.
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