In 2025, the price of isooctanol fluctuated and fell
According to the Commodity Market Analysis System of Shengyi Society, as of December 31st, the price of isooctanol was 6916.67 yuan/ton, a fluctuating decrease of 8.99% compared to the price of 7600 yuan/ton on January 1st. The average price of isooctanol in 2025 is 7249.70 yuan/ton, a decrease of 26.69% from the average price of 9889.58 yuan/ton in 2024, reaching a new low in nearly five years. Due to factors such as overcapacity in isooctanol enterprises, weak downstream demand, and insufficient cost support, the price of isooctanol will enter a period of deep adjustment in 2025. The price of isooctanol will fluctuate and decline in 2025.
Analysis of the Price Trend of Isooctanol in 2025
Phase 1: High level consolidation of isooctanol prices in January and February. During the New Year and Spring Festival holidays, there will be a slight fluctuation in prices due to restocking after the holiday.
Phase 2: The price of isooctanol fluctuated and fell from March to April. During the off-season of demand, the operating rate of isooctanol enterprises has decreased, and coupled with the decline in raw materials, the price of isooctanol has fluctuated and fallen.
Phase 3: Isooctanol prices fluctuated and consolidated from May to July. There is overcapacity in isooctanol enterprises, and enterprises such as Luxi Chemical and Hualu Hengsheng are undergoing maintenance. The operating rate of these enterprises is about 80%, and the supply of isooctanol is tight, causing fluctuations and consolidation in isooctanol prices.
Stage 4: The price of isooctanol drops rapidly from August to October. Due to overcapacity in isooctanol enterprises and an increase in production to a maximum of 95%, the price of isooctanol has dropped significantly, reaching a new low since May 2020.
Phase 5: The price of isooctanol rebounded and rose in November and December. The production rate of isooctanol enterprises has dropped to about 70%, and the supply of isooctanol is insufficient, causing the price of isooctanol to rebound and rise.
Supply side: Capacity expansion, reduced operating rate under pressure
In 2025, the total domestic production capacity of isooctanol will be about 3.8 million tons per year, with an additional production capacity of about 500000 tons, mainly from the expansion projects of leading enterprises. The operating rate of isooctanol enterprises fluctuates between 60% and 95% throughout the year, dropping to around 60% in April and rising to 90% from August to October. The overall operating rate is less than 80%, and the overall supply of isooctanol is surplus.
Demand side: downstream weakness, accelerated substitution
More than 90% of the demand for isooctanol comes from the plasticizer industry, with DOP accounting for about 70% and environmentally friendly plasticizers such as DOTP accounting for about 20%. The operating rate of DOP enterprises will fluctuate between 40% and 65% in 2025, and the sluggish real estate market will lead to a decline in demand for PVC products. The procurement of isooctanol will mainly be for essential needs, and inventory will remain low; The tightening of environmental policies has accelerated the replacement of DOP with environmentally friendly plasticizers such as DOTP, resulting in weak demand for isooctanol.
The price of raw material propylene has fluctuated and fallen, while the cost of isooctanol has decreased
According to the Commodity Market Analysis System of Shengyi Society, as of December 31st, the price of propylene was 5717.67 yuan/ton, a fluctuating decrease of 16.36% compared to the price of 6835.75 yuan/ton on January 1st. The price of propylene has fluctuated and fallen, and the cost of isooctanol has decreased. The cost support is weak, and the downward pressure on isooctanol has increased. In 2025, most of the time isooctanol was in a state of slight profit or loss. In October, the price of isooctanol fell below the cost line and suffered a slight loss. With the rebound of isooctanol prices, profits rebounded in December.
Market Overview and Outlook

According to the data analyst of Business Society’s octanol products, in the short term, in the first quarter of 2026, the supply of isooctanol will be tight due to a combination of factors such as replenishment of inventory by isooctanol enterprises after the Spring Festival, new production capacity of isooctanol, and a decrease in enterprise operation; The price of propylene has risen, and the cost support of isooctanol has increased. In the first quarter, the price of isooctanol fluctuated and rose. In the long run, the addition of new production capacity for isooctanol and the accelerated withdrawal of outdated production capacity due to capacity integration may lead to a long-term oversupply of isooctanol. It is expected that the price of isooctanol will consolidate at a low level.