On September 21, 2026, the spot price of phthalic anhydride in China slightly decreased. The average difference indicators showed that all three differences were lower than the previous day, indicating a clear downward trend. The current price is at a high level within the last one-year cycle, with limited room for further increases. Major manufacturers in China have also lowered their quotations. There are both maintenance and low operating rates in the production facilities, and it will be necessary to monitor the follow-up demand from downstream sectors.
Data Description
The most recent data currently available is as of September 21, 2026; real-time data is recommended.
1. Mean Difference Change Table
| Mean Difference Indicator | Value as of 2026.09.21 | Value as of 2026.09.20 | Direction of Change |
|---|---|---|---|
| 5-Day Mean Difference (D5) | -80 | 0 | - |
| 10-Day Mean Difference (D10) | 33.33 | 58.33 | - |
| 20-Day Mean Difference (D20) | 290 | 321.67 | - |
2. Signal Status Determination
Clearly identify a downtrend signal
3. Trend Direction Conclusion
The price trend is clearly downward. Reason: The changes in the 5-day, 10-day, and 20-day average differences from the previous day are all negative, consistent with the rule for a clear downward trend according to the average difference method; on the fundamental side, on September 21, the mainstream phthalic anhydride manufacturers in China all lowered their quotes, and the actual transaction prices also fell, further supporting the judgment of a downward trend.
4. Positional Spatial Reference
Phthalic anhydride 60-day, 3-month, and 1-year cycle prices are all at high levels, corresponding to the 5th tier out of 5 tiers, with limited room for further increases.
5. Trend Chart Display
6. Industry Chain and Vendor Updates
Upstream: The upstream commodities in the phthalic anhydride industry chain are refined naphthalene and OX.
Downstream: Covers multiple product categories, including bentazone, phosmet, unsaturated resins, DOP, DBP, and more.
Manufacturer Updates: On September 21, Zhenjiang Liancheng Chemical's 120,000-ton phthalic anhydride plant was shut down for maintenance, with the phthalic anhydride price at 10,150 CNY per ton, a decrease in the quoted price; Changzhou Xinyang's 100,000-ton phthalic anhydride facility utilization rate is around 60%, with low inventory. The phthalic anhydride price was reduced by 100 CNY per ton to 10,300 CNY per ton, and the actual transaction prices have also decreased.
7. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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