In June, the price of plasticizer DOP first rose and then fell. As of June 15th, the price of DOP was 9234.17 yuan/ton, which was a 1.00% increase from the June 1st price of DOP of 9142.50 yuan/ton. In June, the domestic DOP market showed an overall trend of “narrow fluctuations and weak upward momentum”. Although the price center of gravity has slightly shifted within the month, the sustained pressure of supply-demand imbalance has limited the room for price increases. With the ceasefire between the US and Iran, the “geopolitical risk premium” is rapidly diminishing, and market logic will return from cost driven to fundamental supply and demand driven.

Cost side: Weakened support for raw materials
The price of raw material isooctanol has stopped rising and fallen
As of June 15th, the price of isooctanol was 8116.67 yuan/ton, which first increased and then decreased by 1.88% compared to the price of 7966.67 yuan/ton on June 1st; The price has increased by 21.75% from 6666.67 yuan/ton on February 28th. In terms of cost, the ceasefire between the United States and Iran and the decline in crude oil prices have dragged down downstream propylene prices, resulting in a decrease in costs and a decrease in cost support for isooctanol; In terms of supply and demand, new production capacity will be put into operation successively in 2026, resulting in an oversupply of isooctanol. In addition, the weak demand for isooctanol will increase the downward pressure on isooctanol prices and DOP.
The phthalic anhydride market is weak and consolidating
As of June 15th, the price of phthalic anhydride from neighboring countries was 8476.67 yuan/ton, a fluctuating decrease of 2.38% compared to the price of 8683.33 yuan/ton on June 1st. The ceasefire between the United States and Iran has shifted the core logic of the phthalic anhydride market from “geopolitical risk premium” to “fundamental rebalancing”. On the cost side, the expectation of a decline in crude oil prices will dominate market sentiment, and there is room for further downward adjustment in the price of ortho phthalic anhydride, which is likely to follow suit. On the demand side, the traditional off-season combined with weak terminal demand has led to weak demand for phthalic anhydride, increasing downward pressure on phthalic anhydride.
June DOP Market Supply and Demand Analysis
Supply side: Overall oversupply
In June, the capacity utilization rate of the DOP industry was 52%, and the main factories were operating steadily; Compared to the low utilization rate in May, the overall spot supply in the market is not tight. But the procurement demand is too weak, and the contradiction of “oversupply” in the market has not been effectively alleviated.
Demand side: Continued weakness
The sluggish demand side is the core factor restricting the upward trend of the market. End users generally lack confidence in the future market, and their purchasing strategies are extremely cautious, limited to buying “essential small orders” and particularly resistant to high priced sources, resulting in limited inquiries and a light trading atmosphere in the overall market.
Market Overview and Future Expectations
The data analyst of Shengyi Society’s plasticizer products believes that the price of raw material octanol has shown signs of loosening and falling, which to some extent reduces the cost pressure on DOP. With the ceasefire between the United States and Iran, crude oil prices have fallen, triggering a new price decline. Considering the difficulty of substantial improvement in downstream demand in the short term, it is expected that the DOP market will continue to consolidate weakly, and the focus may further shift slightly downwards. The recovery of industry profits also faces significant uncertainty.