Recently, the phthalic anhydride market quotations in China have continued to show a slight upward trend. Manufacturers such as Changzhou Xinyang and Tongling Chemical have maintained low operating rates or resumed production, with low inventory levels supporting the quotations. The spread indicators show that the current phthalic anhydride prices are in a strong consolidation (bullish) oscillation state, and the prices are in the high range of a 1-year cycle, with limited room for further increases.
I. Table of Mean Difference Changes
| Average Difference Type | Today's Value (2026-08-16) | Yesterday's Value (2026-08-15) | Direction of Change |
|---|---|---|---|
| 5-day Average Difference (D5) | 36.67 | 73.33 | - |
| 10-day Average Difference (D10) | 20 | -16.66 | + |
| 20-day Average Difference (D20) | -76.67 | -80 | + |
II. Signal Status Determination
The current mean difference change direction combination is (－, ＋, ＋), which belongs to a strong consolidation (biased towards bullish) signal.
III. Conclusions on Trend Directions
The phthalic anhydride price trend is oscillating. The reason is that the changes in the three average differences from the previous day are not entirely consistent. Specifically, the 5-day average difference has narrowed, the 10-day average difference has turned from negative to positive, and the absolute value of the 20-day average difference has narrowed. This aligns with the characteristics of a strong consolidation (favoring an upward trend) in an oscillating market. In the short term, there is some support for the price, but there is a lack of clear and sustained momentum for a price increase.
4. Spatial Reference
Phthalic anhydride prices are in the 5th tier (high) of the 1-year price range, with limited room for further increases, and there is a need to be cautious about the risk of a pullback from these high levels.
V. Chart Display
Six, Supplementary Market Dynamics
Changzhou Xinyang: On August 14, the phthalic anhydride quotation was 9,200 CNY/ton, an increase of 50 CNY/ton from August 13. The facility has a capacity of 100,000 tons, with an operating rate of around 50%, and inventory is low, with limited orders accepted. On August 11, the quotation was 9,100 CNY/ton, a decrease of 50 CNY/ton from the previous level.
Tongling Chemical Industry Group: On August 12, the quoted price for phthalic anhydride was 9,050 CNY per ton, up 50 CNY per ton from the previous day (August 11). The naphthalene-based phthalic anhydride units have resumed operations, with small orders being shipped on a case-by-case basis; detailed discussions are required for actual transactions. On August 11, the quoted price was 9,000 CNY per ton, down 100 CNY per ton from the previous quote.
Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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