According to the monitoring of the commodity market analysis system of Shengyi Society, the average price of LLDPE (7042) was 7240 yuan/ton on October 1st and 7106 yuan/ton on October 30th, a decrease of 1.84%. LDPE (2426H) had an average price of 9596 yuan/ton on October 1st and 9350 yuan/ton on October 30th, a decrease of 2.57%. The average price of HDPE (2426H) on October 1st was 7912 yuan/ton, and on October 30th it was 7650 yuan/ton, a decrease of 3.32%.
The performance of polyethylene in October was not good, and in the latter half of the year, linear products rebounded slightly due to macroeconomic favorable factors. After the National Day holiday, polyethylene inventory has accumulated, coupled with an increase in imported resources arriving at the port and the imminent production of new domestic capacity, resulting in significant pressure on the supply side. In October, agricultural film was in the peak demand season, with an increase in production rate compared to the previous period. However, some factories slowed down their follow-up orders in the later stage, resulting in lower demand compared to the same period in previous years. Downstream orders mainly maintained the need to replenish inventory, which limited support for the polyethylene spot market. Producers and traders are actively lowering prices to reduce inventory, leading to a weakening of the polyethylene market.
The supply and demand fundamentals of polyethylene are still weak, and it is expected that polyethylene will mainly operate weakly, but the downward space is limited.

1、 Price trend
According to the Commodity Market Analysis System of Shengyi Society, the aniline market remained strong and rose in October. On October 1st, the market price of aniline was 7750 yuan/ton, and on October 28th, the price was 7995 yuan/ton, an increase of 3.06% during the period and a decrease of 14.95% compared to the same period last year.
2、 Analysis and Review
The aniline market in October was mainly boosted by favorable supply side conditions. After the National Day holiday, mainstream factories began to reduce load and carry out maintenance production. Equipment maintenance in the main production area has led to supply contraction and increased prices from suppliers. Subsequently, the maintenance equipment was restarted one after another, and the favorable support from the supply side weakened. Downstream demand remains high as raw materials continue to weaken. Under the influence of multiple factors, the aniline market is in a state of stagnation and consolidation.
Pure benzene: Crude oil weakens, downstream of pure benzene continues to suffer losses, low enthusiasm for raw material procurement, and cautious market sentiment. Combined with weak downstream growth and insufficient new orders from end-users, the pure benzene market continued to decline in October.
3、 Future expectations
At present, the cost of the aniline market is weak, coupled with weak demand. Once the supply side benefits are exhausted, it is expected that the possibility of the aniline market weakening in the short term will increase.

According to the commodity analysis system of Shengyi Society, the domestic maleic anhydride market has slightly declined recently. As of October 27th, the average market price of n-butane oxidation maleic anhydride remained at 5375 yuan/ton, a decrease of 1.38% from 5450 yuan/ton on October 20th.
Supply side: Recently, the overall market for maleic anhydride has fallen, with previous auctions in Yantai not being successful, which has limited support for the maleic anhydride market and led to a price correction for the main maleic anhydride factories; Recently, the auction price of Wanhua has slightly increased, and the maleic anhydride market has rebounded slightly; The downstream unsaturated resin of maleic anhydride has limited procurement and poor stocking atmosphere. As of October 27th, the solid anhydride market in Shandong Province operates around a factory price of 5000 yuan/ton, while the liquid anhydride market operates around a factory price of 4800 yuan/ton.
Upstream: The overall price of n-butane has fallen this week, and as of October 27th, the price in Shandong is around 4230 yuan/ton.
Downstream: Currently, the unsaturated resin market remains stable, with some factories experiencing a slight increase in operating load. Downstream transactions are average, with a focus on maintaining basic demand.
The analyst of Shengyi Society’s maleic anhydride products believes that currently, the main downstream unsaturated resin for maleic anhydride is in urgent need of procurement; There is no significant increase in the supply of maleic anhydride, and the main production area of Shandong has followed suit with the increase in bidding prices in Yantai. It is expected that the maleic anhydride market will rise slightly in the near future.

The center of gravity of ethylene glycol prices shifted downwards in October, and there are signs of stabilization this week
This week, the price of ethylene glycol first fell and then rose, showing signs of stabilizing and stopping the decline. According to data from Shengyi Society, as of October 24th, the average price of domestic oil to ethylene glycol was 4276.67 yuan/ton, a decrease of 2.47% from the average price of 4385 yuan/ton on October 1st.
In terms of port ethylene glycol, the basis of port ethylene glycol spot contracts (starting from 500 tons) is generally strong, and the basis transactions have increased significantly this week; As of October 24th, the actual trading range of this week’s contract basis is+95 to+107, an increase of 20-35 compared to last week.
The spot price of domestic coal to polyester grade ethylene glycol (loose water, tax included, self pickup) per unit is 3830-4030 yuan/ton.
In terms of external ethylene glycol, as of October 24th, recent ship cargo negotiations have resulted in transactions around $488-491 per ton.
The main reasons for the recent stabilization and stabilization of ethylene glycol prices are:
1. News of East China’s major factories switching production in November
There are new variables on the supply side, and market rumors suggest that a large factory in East China plans to shut down and switch production in November. The market is gradually digesting the supply of Yulong Petrochemical, and the pressure on domestic supply expectations has eased.
2. Inventory data declines
On October 23, 2025, the total inventory of ethylene glycol in the main ports of East China was 483000 tons, a decrease of 30000 tons compared to the total inventory of ethylene glycol in the main ports of East China on October 20, which was 513000 tons. The weekly cargo arrival volume has decreased, breaking the expectation of continuous inventory accumulation.
3. International crude oil prices have risen significantly
On October 23, 2025, international crude oil futures saw a significant increase. The price of light crude oil futures for December delivery on the New York Mercantile Exchange rose by $3.29, closing at $61.79 per barrel, an increase of 5.62%; The London Brent crude oil futures price for December delivery rose by $3.40 to close at $65.99 per barrel, an increase of 5.43%. The significant increase in raw material prices has affected investors’ expectations for the ethylene glycol market.
The probability of ethylene glycol prices starting weak and then strong in October is high
The overall inventory of ethylene glycol ports is still relatively low, and there is currently little pressure on spot supply. The recent price decline is mainly due to strong domestic supply expectations, more overseas imports to ports, weak downstream terminal hoarding willingness, strong inventory data, and weak market expectations for early trading fundamentals. At present, the price has fallen significantly and there are signs of stabilization in the near future. We will wait and see the strength of the bullish support in the future. Ethylene glycol is expected to bottom out and rebound in the short term. There is a high probability that the price of ethylene glycol will first weaken and then strengthen in October.

1、 Price trend
According to the monitoring of the commodity market analysis system of Shengyi Society, the PVC spot market adjusted mainly within the range this week (10.20-24), and the price did not change much compared to last week, with a slight increase in market prices during the week. As of Friday, the average price of SG-5 PVC carbide method in China was 4542 yuan/ton, with a 0.13% increase in PVC prices this week.
2、 Market analysis
The ex factory price of PVC manufacturers has not changed much this week, with some minor adjustments controlled within 50 yuan/ton. The main reason is that the fundamentals have not improved significantly, and crude oil prices have rebounded. However, the PVC futures market has not yet shaken off the weak pattern and maintained a range bound volatile market this week. The price of PVC remains weak, and the overall range of volatility continues to narrow. From the perspective of supply and demand fundamentals, the spot PVC market has shown loose supply and demand, and most manufacturers are operating stably. There is not much pressure on supply and demand, and dealer offers are generally weak. Downstream demand performance is insufficient, and downstream procurement is mainly based on spot prices. The enthusiasm for inquiry procurement is not high, and the market atmosphere is sluggish. Overall, it is still mainly based on basic needs. As of now, the quotation range for PVC SG5 electrical aggregate in China is mostly around 4600-4700 yuan/ton.
In terms of upstream calcium carbide, as we enter October, the price of calcium carbide continues to decline. This week, the calcium carbide market still shows weakness, and prices continue to decline. According to the Commodity Analysis System of Shengyi Society, the decline this week was 0.31%. The weak prices of upstream raw materials have brought certain negative effects to PVC.
3、 Future forecast
The PVC analyst from Shengyi Society believes that in terms of cost, upstream calcium carbide continues to be weak, and there is no signal of a rebound in the market, which will continue to suppress PVC prices in the later stage. From the perspective of supply and demand, the PVC spot market is lukewarm, mainly due to insufficient downstream operating rates and average demand. The supply-demand pattern is difficult to change in the short term, and it is expected that PVC prices will continue to maintain a range adjustment pattern next week.

The domestic market for anhydrous hydrogen fluoride rose in October. According to the analysis system of Shengyi Society, as of October 23, the benchmark price of hydrofluoric acid in Shengyi Society was 12666.67 yuan/ton, an increase of 10.47% compared to September.
Raw material side: The domestic fluorite market operated at a high level in October. According to the analysis system of Shengyi Society, as of October 23rd, the benchmark price of Shengyi Society’s fluorite was 3637.50 yuan/ton, an increase of 0.76% compared to the beginning of this month (3610.00 yuan/ton). The current situation of the game in the domestic fluorite industry still exists, and overall, the operating rate of enterprises has not changed much. Upstream mining is still tight, and backward mines will continue to be eliminated. In terms of new mines, mineral investigation work is still difficult. In addition, the national department needs to reform fluorite mines, and fluorite mining enterprises are facing increasingly strict safety and environmental protection requirements. The difficulty of operating fluorite mines has increased, and the shortage of raw materials has limited the operating rate of fluorite enterprises. The operating rate of some mines in the south is relatively low, and the supply of fluorite enterprises in the field is tight, leading to obvious intentions of holders to raise prices. As the temperature in the north drops, the winter shutdown period for mines and beneficiation plants in the northern region is approaching, further tightening market supply and maintaining a high level of fluorite market. The cost of hydrofluoric acid still has some support.
Demand side: The overall operating rate of the downstream refrigerant industry was relatively low in October. Affected by the load reduction or shutdown of R125 East China plant, the market supply has decreased, but the price increase is limited. The market price of R22 continues to decline, with the East China market price dropping from 33500 yuan/ton at the beginning of the month to 16000 yuan/ton, a decrease of 51.52%. Overall, downstream refrigerant terminal demand is weak and has not improved, making it difficult to form effective support for anhydrous hydrogen fluoride.
Market forecast: The raw material fluorite market is supported at a high level, but downstream willingness to accept high priced raw materials is weak. Procurement is mainly based on essential needs, and the market trading atmosphere is cold. It is expected that the anhydrous hydrogen fluoride market will mainly consolidate in the later stage. More attention should be paid to changes in market supply and demand.

According to the Commodity Market Analysis System of Shengyi Society, multiple negative factors continue to exist after the National Day holiday, and the domestic adipic acid market continues to decline. On October 1st, the average market price of adipic acid was 7200 yuan/ton. On October 22nd, the average market price of adipic acid in China was 7000 yuan/ton, a decrease of 2.78%.
Negative pressure on domestic adipic acid market continues to decline
Since the National Day holiday, the prices of cyclohexanone and pure benzene raw materials for adipic acid have been weak and declining. Due to weak demand for terminal rigidity, the transaction volume of adipic acid market has declined, and manufacturers have lowered their ex factory prices. The adipic acid market continues to decline. As of October 22, the mainstream market price in Shandong is around 7000 yuan/ton, and the mainstream market price in Jiangsu is 6800 yuan/ton. The average price in the domestic market has dropped to 7000 yuan/ton, a decrease of 200 yuan/ton, and the decline is approaching 3%.
An analyst from Shengyi Society believes that by the end of October, the rigid demand in the terminal industry was poor, and the rise in raw material prices was weak. The market for adipic acid will continue to weaken in the future.

1、 Price trend
According to the commodity analysis system of Shengyi Society, the price of caustic soda has remained stable this week. The average market price from the beginning of the week to the end of the week was 848 yuan/ton, a year-on-year decrease of 7.12%. On October 16th, the Business Society Chlor Alkali Index was 785 points, unchanged from yesterday, a decrease of 63.11% from the highest point of 2128 points during the cycle (2021-10-24), and an increase of 10.25% from the lowest point of 712 points on January 5th, 2016. (Note: The cycle refers to the period from December 1, 2011 to present)
2、 Market analysis
According to the commodity analysis system of Shengyi Society, the price of caustic soda remained stable over the weekend this week. The price of caustic soda in Shandong region is around 760-890 yuan/ton in the mainstream market of 32% ion-exchange membrane alkali. The price of caustic soda in Jiangsu region is stable, with the mainstream market price of 32% ion-exchange membrane alkali being around 890-1000 yuan/ton. The price of caustic soda in Inner Mongolia region is stable, with the mainstream market price of 32% ion-exchange membrane alkali being around 2700-2800 yuan/ton (converted to 100%). From the perspective of the Shandong region, inventory pressure is not high, and there is an increase in maintenance and a decrease in supply. There are still companies with maintenance expectations next week. Downstream alumina has a purchasing intention in the near future, but distributors still have pessimistic sentiment, and the overall trend is expected to be weak. They will purchase caustic soda as needed.
Business analysts believe that in the near future, the price of caustic soda has remained stable, and downstream consumers in China have been purchasing on demand. There is not much inventory pressure on caustic soda companies, and the comprehensive supply-demand game predicts that caustic soda will maintain a stable operating market in the later stage, depending on downstream market demand.

Since October, the domestic PTA spot market prices have continued to explore low levels. According to the Commodity Market Analysis System of Shengyi Society, as of October 17th, the spot price of PTA in East China was 4381 yuan/ton, a decrease of 4.65% from the beginning of the month. Due to insufficient cost support, the commissioning of new facilities, and weak demand, coupled with negative factors, PTA prices are running weakly.
The price trend of the crude oil market has declined. As of the 16th, the settlement price of the December WTI crude oil futures contract in the United States was $56.99 per barrel, and the settlement price of the December Brent crude oil futures contract was $61.06 per barrel. The crude oil market is affected by negative factors. On the one hand, OPEC+has launched a new round of production increase of 1.65 million barrels per day, but the market is still concerned about the long-term risk of oversupply, and the crude oil market continues to decline; On the other hand, the easing of the situation between Israel and Palestine, coupled with weakened demand from the United States, has dragged down global economic and demand expectations due to US tariffs. In addition, the increase in US crude oil inventories has led to the end of the peak oil season in the United States, and the global economic outlook and oil demand are not optimistic, resulting in a rapid decline in international oil prices.
In terms of its own equipment, Yisheng Ningbo’s 2 # 2.2 million ton PTA plant reduced its load to around 80% on October 17th due to unforeseen circumstances. Hengli Petrochemical’s 1 # 2.2 million ton unit will shut down on October 9th. Yisheng New Materials’ 2 # 3.6 million ton PTA plant experienced a load reduction on October 7th due to unforeseen circumstances and resumed operations on October 14th. Hailun Petrochemical’s 3.2 million ton new unit will be tested and discharged at the end of July, with a continuous increase in load to 80% -90%. The overall operating rate of the industry is currently around 75%.
In terms of demand, downstream polyester industry equipment has experienced load increase and long shutdown equipment restart phenomena, but the progress of load increase is slow and maintained at around 87%. As the e-commerce shopping festival approaches, the consumer atmosphere in the terminal clothing and home textile industry is gradually becoming stronger. However, weaving enterprises still have limited new and supplementary orders, and their performance is lukewarm. The comprehensive operating rate of chemical fiber weaving in Jiangsu and Zhejiang regions is around 64%.
Business analysts believe that there are still many uncertain factors such as tariffs, and the sentiment in the commodity market is suppressed. The loose supply and poor demand in the crude oil market have put pressure on the oil market. In addition, downstream confidence in the market is insufficient, procurement enthusiasm is average, and the PTA market lacks further driving force, with prices still mainly fluctuating weakly.

After the holiday, the domestic epoxy propane market surged and then stabilized. According to the monitoring system of Shengyi Society, as of October 16th, the benchmark price of Shengyi Society’s epoxy propane was 8066.67 yuan/ton, an increase of 3.86% compared to October 1st.
Price influencing factors:
Raw material side: The market price of raw material propylene has slightly increased, and there is still support for the epoxy propane market on the raw material side. As of October 16th, the benchmark price of propylene in Shengyi Society was 6400.75 yuan/ton, a decrease of 2.18% compared to the beginning of this month (6543.25 yuan/ton). The rise in raw material propylene prices has provided some support to the epoxy propane market.
Supply side: The epoxy propane supply side will tighten after the holiday. Multiple companies have announced parking or load reduction plans, resulting in a reduction in market supply scale. However, downstream enterprises have weak demand and are mainly adopting a wait-and-see approach, with cautious procurement. Expected stable operation of epoxy propane in the later stage.
Demand side: Downstream polyether enterprises are holding onto their essential procurement needs in multiple dimensions after the holiday, with a strong wait-and-see attitude. The load adjustment of the polyether end is limited, while the propylene glycol enterprise is increasing its load, and the overall demand performance is flat. The demand side has limited support for the epoxy propane market.
Market forecast:
Business Society’s epoxy propane analyst believes that the positive support for the domestic epoxy propane market is relatively limited, with a slight rebound in the raw material side propylene market and acceptable support. However, downstream demand is weak, and there is a strong wait-and-see sentiment. It is expected that the epoxy propane market will remain stable in the later stage, and more attention should be paid to changes in raw material prices and market supply and demand.