In September, the butadiene rubber market was weak and volatile, with a downward trend. According to the commodity market analysis system of Shengyi Society, as of September 29th, the butadiene rubber market price in East China was 11750 yuan/ton, a decrease of 3.69% from 12200 yuan/ton at the beginning of the month.
On the one hand, the price of raw material butadiene has fluctuated and fallen, which has a negative impact on the cost of butadiene rubber; On the other hand, the production of butadiene rubber has slightly decreased, and the pressure on the supply side has eased; Downstream tire production fluctuated slightly, mainly supporting the demand for butadiene rubber. As of September 29th, the mainstream prices for Qilu, Daqing, Sichuan, and Yangtze Shunding in East China were 11650-12000 yuan/ton.
In September, the price of butadiene weakened and the cost support for butadiene rubber weakened. According to the Commodity Market Analysis System of Shengyi Society, as of September 29th, the price of butadiene was 8990 yuan/ton, a decrease of 3.51% from 9316 yuan/ton at the beginning of the month.
Affected by the shutdown and maintenance of multiple butadiene rubber units, the domestic butadiene rubber units slightly decreased in September, and as of the end of September, the domestic butadiene rubber production started at around 6.60%.
On the demand side, downstream tire production in September remained stable with a slight increase, providing essential support for the butadiene rubber market. As of September 28th, the construction of semi steel tires by domestic tire companies has started at around 7.3%; The construction of all steel tires by tire companies in Shandong Province has slightly increased to around 6.60%.
Market forecast: From a fundamental perspective, analysts from Shengyi Society believe that the abundant supply of raw material butadiene is mainly due to weak market conditions, with slight fluctuations in downstream tire production. Overall, it is expected that butadiene rubber may experience consolidation in the later period.

This week, the domestic phenol market has weakened and declined. According to data monitored by Shengyi Society, from the perspective of the East China market, the domestic phenol market price was 6986 yuan/ton on September 21, and 6873 yuan/ton on September 26, a decrease of. 62%. Many pre-sale holiday futures before the holiday fell to 6800 yuan/ton. From the perspective of the national market, all major mainstream markets have experienced an equal degree of decline.
This week, the domestic phenol market was dominated by a decline, with Sinopec East China listed at 7050 yuan/ton. We are concerned about the possibility of price adjustments in the future. From a supply side perspective, the inventory of phenol at Jiangyin Port dropped to 7000 tons at the beginning of the week, and there was not much replenishment of domestic trade ships during the week. From a supply side perspective, there was not much pressure, and the market downturn space was controlled. From a demand perspective, downstream demand for bisphenol A is expected to decrease, and pre-sale goods are low at the end of the month or during holidays, resulting in insufficient pre holiday transactions.
According to statistics, the cargo volume of phenol in the East China region is 27200 tons, with 24200 tons already arrived and 3000 tons in transit. We will pay attention to the subsequent arrival of the cargo at the port.
Business Society expects that the increase in domestic supply will be smaller than demand. As the holiday approaches and pre holiday stocking is completed, the expected terminal purchasing volume will decrease. The replenishment of domestic shipping cargo is not significant, and there is an early pre-sale operation, resulting in limited supply of spot goods. After the holiday, there is expected to be a slight increase in the supply side. We will pay attention to the progress of Jilin Petrochemical’s new phenol ketone plant, the replenishment of domestic trade cargo, and the spot supply situation. On the post holiday demand side, there is an expected increase in demand for bisphenol A, while other downstream sectors have finished pre holiday stocking and reduced procurement. The price trend of dual raw materials after the holiday is not easy, and the impact on the cost side is limited.

Business Society, September 28th News: In September 2025, the overall price of polyester bottle chips showed a weak downward trend. According to the Commodity Market Analysis System of Shengyi Society, in the first and middle of September, there was a continuous decline, and the average selling price of PET fell to 5840 yuan/ton at one point, a decrease of 0.35% from the beginning of the week. In late September (the last week), the market bottomed out and rebounded, with prices in the East China market rising to 5900 yuan/ton. Weakened cost side support: The international crude oil market fell due to market concerns caused by poor economic data in the United States, while the PTA market was weak and volatile, making it difficult to effectively support bottle costs. Crude oil, as the upstream raw material for polyester bottle chips, has experienced a price drop, which has led to a decrease in the cost of polyester bottle chips and subsequently driven down prices. Supply side pressure still exists: domestic polyester bottle production increased by 1100 tons to 330300 tons compared to the previous period, and the capacity utilization rate slightly increased by 0.23% to 72.31%. The market has sufficient spot supply, and even if some companies have reduced production, the overall supply is still at a high level, which continues to suppress the price rebound space. The demand side continues to be weak: downstream terminals such as the soft drink packaging industry mainly rely on rigid procurement, and it is currently in the seasonal off-season, with a lack of market momentum and fewer inquiries. End users often adopt a on-demand procurement strategy without large-scale purchasing behavior, which cannot provide upward momentum for prices. Market sentiment cautious: In the pattern of “weak cost and weak demand”, the trading atmosphere in the market is average, and the mentality of participants is generally cautious. The low trading enthusiasm and market activity of both buyers and sellers make it difficult for prices to fluctuate significantly, resulting in an overall weak downward trend. Affected by factors such as weakened cost support, weak demand, and ongoing supply pressure, Shengyi Society believes that the price of polyester bottle flakes is expected to fluctuate weakly within the range of 5750-5900 yuan/ton.

According to the commodity analysis system of Shengyi Society, the market for locally refined petroleum coke declined in mid September. As of September 21, the price of locally refined petroleum coke in the Shandong market was 2355.00 yuan/ton, a decrease of 3.78% from 2447.50 yuan/ton on September 11.
Recently, the price of crude oil fluctuated and rose, mainly because the Russia-Ukraine conflict caused the market to worry about potential supply risks, and the Federal Reserve cut interest rates by 25 basis points to support oil prices.
In mid September, the petroleum coke market in the local refining industry declined, with average shipments from refineries. Some refineries’ petroleum coke prices fluctuated significantly with indicators, and petroleum coke prices fluctuated alternately; Downstream enterprises have average enthusiasm for purchasing petroleum coke, with a strong wait-and-see attitude, and are relatively cautious when entering the market for procurement. Recently, there has been a positive trend in the production of petroleum coke at the port, with a decrease in the number of ships arriving at the port and a continuous decrease in port inventory. The downstream mainly flows towards carbon and some towards silicon carbide plants.
In mid September, the market for calcined coke remained stable with an upward trend, and downstream purchases were more active, resulting in an increase in prices for newly signed orders.
Market forecast: Currently, the trading in the local refined petroleum coke market is weak, and downstream enthusiasm for petroleum coke procurement is average, with limited support for petroleum coke. It is expected that petroleum coke will mainly consolidate weakly in the near future.

According to the Commodity Market Analysis System of Shengyi Society, as of the 21st, the price of ethyl acetate was 5356.67 yuan/ton, an increase of 0.44% compared to the price of 5333.33 yuan/ton on September 15th. The price of acetic acid has risen, with favorable raw material support and stable downstream demand. Supply side enterprises have low inventory, and the market for ethyl acetate has stabilized and risen.
The utilization rate of domestic ethyl acetate production capacity remains low, and there is not much pressure on enterprise inventory. Downstream entry into the market follows up on demand, and market trading is still acceptable. The price of acetic acid on the raw material side has risen, and the atmosphere in the ethyl acetate market has been boosted by costs. In addition, with the support of the traditional peak season mentality, the price of ethyl acetate has been strongly raised.
Looking at the future, the inventory of ethyl acetate enterprises is currently low, with strong quotations as the main factor. As the holiday approaches, market demand is optimistic, and enterprises are actively shipping. At the same time, the raw material market is supportive. It is expected that ethyl acetate will continue to operate strongly in the short term, and specific attention will be paid to the trend of raw materials and downstream follow-up.

price trend
According to the monitoring of the commodity market analysis system of Shengyi Society, the market price of isopropanol has slightly decreased this week. At the beginning of the week, the average price of isopropanol in China was 5691.67 yuan/ton, and the average price over the weekend was 5675 yuan/ton, with a price reduction of 0.29%.
The market price of isopropanol has slightly decreased this week. At present, the trading atmosphere on the exchange is average, and the downstream purchasing atmosphere is weak. Some high-end quotations have loosened, and the price focus is biased towards the low-end. The overall market is dominated by cautious negotiations, with average actual transaction performance. As of now, most of the isopropanol market prices in Shandong are around 5550-5600 yuan/ton; The majority of isopropanol market prices in Jiangsu region are around 5650-5700 yuan/ton.
Future forecast
The isopropanol analyst from the Chemical Branch of Shengyi Society believes that the market price of isopropanol has slightly decreased this week, with actual orders being the main demand. Market negotiations are cautious. It is expected that the short-term market will mainly focus on weak consolidation, with more attention paid to the trading trends of major companies.

According to the price data from Shengyi Society, on September 19, 2025, the average selling price of PET was 5870 yuan/ton, a decrease of 0.35% from the beginning of the week. The overall price of polyester bottle flakes (PET) is showing a weak downward trend.
Cost support significantly weakened: The international crude oil market fell due to market concerns caused by poor economic data in the United States, while the PTA market remained weak and volatile, making it difficult to effectively support bottle costs.
Supply pressure still exists: domestic polyester bottle production increased by 1100 tons to 330300 tons compared to the previous period, and the capacity utilization rate slightly increased by 0.23% to 72.31%. The ample supply of spot goods in the market continues to suppress the potential for price rebound.
The demand side continues to be weak: downstream terminals (such as the soft drink packaging industry) are mainly focused on rigid procurement, and it is a seasonal off-season with a lack of market momentum and fewer inquiries.
Market sentiment cautious: In the pattern of “weak cost and demand”, the trading atmosphere in the market is generally average, and the mentality is generally cautious.
Business Society predicts that the price of polyester bottle chips is expected to fluctuate weakly within the range of 5750-5900 yuan/ton. Whether the market can stabilize largely depends on whether the cost side (crude oil and PTA prices) can stop falling and rebound, as well as whether downstream demand has substantially improved.

According to the commodity analysis system of Shengyi Society, starting from September 8th, the hydrogen peroxide market has gradually rebounded and prices have steadily increased. On September 8th, the average market price of hydrogen peroxide was 690 yuan/ton, and on September 16th, the average market price of hydrogen peroxide was 713 yuan/ton, with a price increase of 3.38%.
The supply is tightening and the hydrogen peroxide market is improving
Starting from the second week of September, the terminal demand in the printing and papermaking industry has improved, with an increase in orders from hydrogen peroxide manufacturers, improved market transactions, increased inventory volume, and a temporary tightening of supply, resulting in a halt to the decline and rise in the market. Due to some manufacturers restarting their equipment one after another, the price increase of hydrogen peroxide in this round has been limited, with an overall increase of 20-30 yuan/ton. As of September 16th, the average price of hydrogen peroxide in the market has risen to around 710 yuan/ton, an increase of more than 3% compared to the 8th.
Business Society’s hydrogen peroxide analyst believes that at the end of September, the demand for terminal printing and papermaking industry was average, and the supply of hydrogen peroxide gradually increased, which may lead to a weak decline in the future market.

The price of ethylene glycol loosened in September. According to data from Shengyi Society, as of September 15th, the average price of domestic oil to ethylene glycol was 4458.33/ton, a decrease of 0.59% from the average price of 4485 yuan/ton on September 1st.
In terms of port ethylene glycol, the spot contract basis for port ethylene glycol on September 15, 2025 is running weakly. The intraday basis trading range for this week’s contract is+95 to+108. As of the closing, the contract basis price for this week is+97 to+99, the contract basis price for September is+100 to+102, and the contract basis price for October is+74 to+78.
The spot price of domestic coal to polyester grade ethylene glycol (loose water, tax included, self pickup) per unit is 4000-4140 yuan/ton.
In terms of external ethylene glycol, as of September 12th, recent cargo negotiations have resulted in a transaction price of around 516 US dollars per ton.
Supply and demand outlook:
In October, supply and demand shifted towards a loose balance, and the fulfillment of equipment supply affected market balance.
Ethylene glycol inventory
On September 15, 2025, the total inventory of ethylene glycol in the main ports of East China was 395600 tons, an increase of 32400 tons compared to the total inventory of 363200 tons on September 11; Compared to June 30th, the total inventory of ethylene glycol in the East China main port was 482000 tons, a decrease of 86400 tons.
Future expectations
There is an expectation of an increase in the short-term arrival of ethylene glycol at the port, and the explicit inventory at the port will continue to rise. At the same time, pre holiday stocking factors may lead to good port shipment performance this month. At present, the supply and demand are tight, and the delivery basis is supported. However, the expected production of new devices has led to expectations of loose supply and demand in the coming months. It is expected that the recent fluctuations will be mainly weak, with limited downward space.

price trend
According to the monitoring of the commodity market analysis system of Shengyi Society, the market price of isopropanol has slightly increased this week. At the beginning of the week, the average price of isopropanol in China was 5650 yuan/ton, and the average price over the weekend was 5675 yuan/ton, with a price increase of 0.44%.
The market price of isopropanol has slightly increased this week. At present, the trading atmosphere on the exchange has slightly rebounded, and manufacturers have a clear intention to raise prices. Holders of goods have followed up with a slight increase in prices. From a demand perspective, downstream orders are mainly based on demand, with buying focused on immediate needs and small orders being followed up. As of now, most of the isopropanol market prices in Shandong are around 5550-5600 yuan/ton; The majority of prices in the isopropanol market in Jiangsu are around 5650-5750 yuan/ton.
Future forecast
The isopropanol analyst from the Chemical Branch of Shengyi Society believes that the market price of isopropanol has slightly increased this week, with actual orders being the main demand and inquiries increasing. Buyers are cautious. It is expected that the isopropanol market will experience a narrow adjustment in the short term, with a focus on the trading trends of major companies.