The current DOP spot price is in the high range of the past year. Since mid-September, quotations from major Chinese producers have been successively reduced. The difference indicators show that DOP is currently in a clear downward trend. With the high prices, there is limited room for further increases. The main reason for the recent price decline is the weak purchasing enthusiasm from downstream PVC plasticizer buyers.
Note: The latest available data used for this analysis is up to September 20, 2026. It is recommended to refer to real-time data.
I. Table of Finite Differences
| Difference Type | Value on 2026.09.20 | Value on 2026.09.19 | Direction of Change |
|---|---|---|---|
| 5-Day Difference (D5) | -3.34 | 13.33 | - |
| 10-Day Difference (D10) | 97.5 | 120.01 | - |
| 20-Day Difference (D20) | 302.09 | 320.83 | - |
II. Signal State Determination
Clearly identify a downtrend signal
III. Conclusion on Trend Direction
The current DOP price trend is clearly downward.
Reason: The 5-day, 10-day, and 20-day differences all show a consistent downward trend compared to the previous day, all being negative, which meets the criteria for a clear downward trend according to the average difference method.
4. Spatial Reference
DOP prices are at the fifth tier (high level) of the one-year cycle, and they remain elevated across both the 60-day and three-month cycles, suggesting limited room for further upside.
V. Price Trend Over the Past Year
VI. Recent Spot Market Dynamics in China
Since mid-September, the prices of major DOP producers in China have been continuously reduced:
September 20: Shandong Sacred Peak Chemical DOP quotation is 10,455 CNY/ton, down by 50 CNY/ton; Kaifeng Jiuhong Chemical DOP quotation is 10,700 CNY/ton, down by 100 CNY/ton.
September 18: Dongying Yimei De Chemical DOP quoted at 10,450 CNY/ton, down 100 CNY/ton; Zhenjiang Liancheng Chemical DOP quoted at 10,700 CNY/ton, down 50 CNY/ton; Kaifeng Jiuhong Chemical DOP quoted at 10,800 CNY/ton, down 100 CNY/ton.
September 17: Shandong Shengfeng Chemical’s DOP price was quoted at RMB 10,555 per ton, down RMB 50 per ton; Dongying Yimeide Chemical’s DOP price was quoted at RMB 10,550 per ton, down RMB 100 per ton.
7. Upstream and Downstream Conditions
Upstream raw materials: 2-ethylhexanol and phthalic anhydride are currently at their highest prices in nearly 1 year, providing some support to DOP costs. However, there are signs of a recent decline in raw material prices.
Downstream demand: DOP is primarily used as a plasticizer for PVC. Currently, downstream buyers are only moderately active, and weak demand is the main driver behind the price decline.
VIII. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
(Source: )
