In September, the price of calcium carbide showed a continuous upward trend. According to monitoring data from Business Society, it rose from 2393 yuan/ton at the beginning of the month to 2608 yuan/ton at the end of the month, an increase of 8.97%. 7、 In August, due to the concentrated maintenance of downstream enterprises of calcium carbide, market demand fell into a slump, and the price of calcium carbide continued to fluctuate downward, gradually accumulating the pressure of losses for production enterprises. In September, demand improved and prices continued to rise. However, in the later period, due to the impact of supply-demand contradictions, there was a high-level consolidation and a weak upward trend.

From the perspective of the supply side, multiple factors have significantly reduced the supply side. Firstly, the continuous losses in the early stage have put pressure on the operation of some calcium carbide production enterprises, resulting in phased shutdowns; Secondly, some power plants in the northwest region have started annual maintenance to prepare for the “summer and winter” season, resulting in an increase in the number of maintenance for their supporting calcium carbide plants. At the same time, some calcium carbide furnaces have undergone planned maintenance, further exacerbating supply shortages.
From the demand side, the reduction in centralized maintenance by downstream enterprises and the recent improvement in the comprehensive profitability of the chlor alkali industry have driven the enthusiasm of chlor alkali enterprises to start production. The National Day holiday is approaching, and in response to the logistics obstruction caused by the restriction of high-speed dangerous goods vehicles during the holiday, downstream enterprises are actively stocking up in advance, further amplifying the current tight supply situation and providing strong support for the upward trend of calcium carbide prices.
Looking at the future, there is an expectation of sustained strength in the start of calcium carbide production in October. The price has significantly increased the enthusiasm of enterprises to resume production. In September, the price of calcium carbide continued to rise, and the profitability of production enterprises shifted from losses to profits, stimulating the motivation for enterprises to start production and resume production in October. In mid October, downstream enterprises will start centralized maintenance, and at the same time, the scale of supporting calcium carbide exports will expand. The combination of these two factors will have a significant impact on the market, pushing the price of calcium carbide into a downward channel. However, the recent increase in the price of raw material blue charcoal has provided some cost support for calcium carbide, and it is expected that the downward trend of calcium carbide prices will be limited, with limited overall room for decline.

The domestic trichloromethane market experienced a slight decline in September. According to the Commodity Market Analysis System of Shengyi Society, as of September 28th, the price of trichloromethane water in Shandong Province was 1883 yuan/ton, a decrease of 3.42% from 1950 yuan/ton at the beginning of September.

The price of raw material methanol fluctuated and consolidated, while the price of liquid chlorine remained weak and consolidated. The cost support for trichloromethane was relatively weak. As the high temperature weather passes, the demand for downstream R22 has slowed down; The market for trichloromethane has slightly declined.
In September, domestic methane chloride facilities were basically stable, and as of September 28th, methane chloride production had started at around 8.7%.
In September, the prices of raw material methanol were adjusted narrowly, and the prices of liquid chlorine were adjusted weakly. The cost support for trichloromethane was relatively weak. According to the Commodity Market Analysis System of Shengyi Society, as of September 28th, the spot price of methanol was 2257 yuan/ton, an increase of 0.19% from 2253 yuan/ton at the beginning of the month; As of September 28th, the price of liquid chlorine tank trucks in Shandong region is around -50 yuan/ton.
In September, downstream refrigerant R22 experienced a slowdown in demand and a decrease in price due to the passing of high temperature weather, which weakened the support for the demand for trichloromethane. In addition, the R22 quota has been decreasing year by year, which has a negative impact on trichloromethane in the medium and long term. In 2013, the baseline production quota for second-generation refrigerants in China was 426400 tons. After multiple pressure drops, it will be reduced to 163600 tons by 2025. Among them, the production quotas for R22, R142b, and R141b are 149100 tons, 0.34 tons, and 0.92 tons, respectively.
The methane chloride data analyst from Shengyi Society believes that the cost support for trichloromethane is relatively weak; The peak season is gradually coming to an end, and the demand for downstream refrigerant R22 is slowing down. The support for chloroform demand in the later period is limited, and it is expected that the chloroform market will be mainly weakly consolidated in the later period.

According to the commodity analysis system of Shengyi Society, the hydrogen peroxide market has rebounded and fluctuated upwards since September 1st. On September 1st, the average market price of hydrogen peroxide was 703 yuan/ton, and on September 26th, the average market price of hydrogen peroxide was 743 yuan/ton, with a price increase of 5.69%.

Lido hits, hydrogen peroxide market continues to rise
Starting from September, the terminal demand in the printing and papermaking industry has declined, and some manufacturers of hydrogen peroxide are still stopping for maintenance. The supply pressure has decreased, and there is a long short game, resulting in weak hydrogen peroxide prices. As of September 4th, the average price in the domestic market has dropped to around 690 yuan/ton. The market transactions are average and the market is declining.
In the second week, the terminal demand in the printing and papermaking industry improved, the order volume of hydrogen peroxide manufacturers increased, market transactions improved, the volume of goods increased, supply tightened temporarily, and the market stopped falling and rose. 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.
In the latter half of the year, with the support of terminal rigid demand, the transaction volume of hydrogen peroxide market improved, the market continued to recover, and prices continued to rise. The average price of hydrogen peroxide in the domestic market has risen to around 740 yuan/ton, an increase of over 4%.
The hydrogen peroxide analyst from Shengyi Society believes that after the National Day holiday, the demand for terminal printing and papermaking industry will increase, and the supply of hydrogen peroxide will become tighter. The market trend will continue to rise in the future.

According to the Commodity Market Analysis System of Shengyi Society, the price of lithium carbonate has shown a narrow upward trend recently. As of September 23, the benchmark price of battery grade lithium carbonate in Shengyi Society was 73266 yuan/ton, an increase of 2.21% compared to last week (September 16), a decrease of 12.5% month on month, and a year-on-year decrease of 5.83%; The benchmark price of industrial grade lithium carbonate trading company was 71766 yuan/ton, up 2.5% from last week (September 16), down 12.66% month on month, and down 4.82% year-on-year.

The demand growth rate exceeds the supply, and the temporary tight balance is evident
Significant peak season characteristics on the demand side
New energy vehicles: In August, domestic production and sales of new energy vehicles increased by 27.4% and 26.8% year-on-year, with a cumulative sales volume of 9.62 million vehicles from January to August, a year-on-year increase of 36.7%. The start of the battery factory’s stocking cycle has driven a rebound in demand for lithium carbonate used in power batteries.
In the field of energy storage, the National Energy Administration’s “Energy Storage Action Plan” promotes some provinces and cities to rush to install, further boosting short-term demand. On September 22, the Ministry of Industry and Information Technology and the National Development and Reform Commission issued the “Guidelines for High Quality Development of Industrial Parks”, which proposed to strengthen the development and utilization of new energy infrastructure such as rooftop photovoltaics, decentralized wind power, diversified energy storage, and charging piles.
Supply side disturbance and increment coexist
Policy restrictions: Eight lithium mica mines in Jiangxi Province have been affected by changes in their mining certificates (requiring mineral type adjustments to be completed before September 30th), and the Jianxiawo mining area under Ningde Times has not resumed production since August, exacerbating market expectations of supply contraction.
Capacity release: The production of lithium extracted from spodumene continues to increase, filling the gap in production reduction of some lithium mica. In September, the weekly production of lithium carbonate in China slightly increased by 544 tons to 19963 tons.

Policy impact: Short term support for prices, long-term regulation of industries
The supply side policy disturbance and the change of lithium mining license policy in Jiangxi Province have become the recent market focus. If most mines are unable to complete the procedures before September 30th, the supply gap may widen, boosting prices in the short term.
According to authoritative sources, relevant departments are preparing to introduce the “Standard Conditions for the Lithium Carbonate Industry”, which plans to set entry thresholds from multiple dimensions such as energy consumption, environmental protection, and technical indicators, and force the elimination of outdated production capacity. The current utilization rate of lithium carbonate production capacity in China is less than 65%, and a large amount of low-cost speculative production capacity is flooding the market. This policy will directly hit the pain points of the industry.
Business Society’s lithium carbonate data analyst believes that the price of lithium carbonate is affected by the peak demand season stocking and supply side policy disturbances, and has recently experienced a narrow rise. The implementation of Jiangxi’s lithium mine policy on September 30th will be a key node. If the supply shrinks beyond expectations, the price may continue to rise. Conversely, if there is no upward momentum, the price will continue to fluctuate near the cost line, and specific market changes still need to be monitored.

1、 Price trend

According to the Commodity Market Analysis System of Shengyi Society, the average price of ammonium sulfate in the domestic market on September 19th was 946 yuan/ton, which is 1.39% lower than the average price of 960 yuan/ton on September 15th.
2、 Market analysis
Supply and demand situation
This week, the domestic ammonium sulfate market prices continued to decline. This week, the internal level operating rate has increased, while the coking level operating rate has remained stable. At present, the supply of ammonium sulfate market is sufficient, but the demand side is still weak, and the market transaction atmosphere is not good. Downstream companies still maintain a wait-and-see attitude and are cautious in their procurement. There is currently no positive news in terms of exports.
market situation
As of September 19th, the mainstream ex factory quotation for coking grade ammonium sulfate in Shandong region is around 860 yuan/ton. Domestic grade ammonium sulfate, the mainstream ex factory quotation in Shandong region is around 900-950 yuan/ton.
3、 Future forecast
An ammonium sulfate analyst from Shengyi Society believes that the recent market trend of ammonium sulfate has been weak and has stabilized after a decline. At present, the ammonium sulfate market has strong supply and weak demand, and there is currently no positive information in the market. It is expected that in the short term, the domestic ammonium sulfate market price will be weak and mainly operated through consolidation.

According to the Commodity Market Analysis System of Shengyi Society, from September 12th to 19th, the average price of BDO in China remained at 7542 yuan/ton, with a month on month decrease of 2.22% and a year-on-year decrease of 0.75%. The domestic BDO market is running steadily, with some equipment undergoing maintenance or reducing production capacity, resulting in reduced supply and industry losses. The supply side intends to shrink in October due to policy support. Downstream maintains contract follow-up, but spot purchases are light under cost pressure. The supply-demand negotiation game has resulted in a stable market focus. According to the Commodity Market Analysis System of Shengyi Society, from September 12th to 19th, the average price of BDO in China remained at 7542 yuan/ton, with a month on month decrease of 2.22% and a year-on-year decrease of 0.75%. The domestic BDO market is running steadily, with some equipment undergoing maintenance or reducing production capacity, resulting in reduced supply and industry losses. The supply side intends to shrink in October due to policy support. Downstream maintains contract follow-up, but spot purchases are light under cost pressure. The supply-demand negotiation game has resulted in a stable market focus.

In terms of supply and equipment, the overall capacity utilization rate of the industry has decreased, resulting in a reduction in the supply of goods. At the same time, the industry has been suffering long-term losses, and the willingness of suppliers to support the market has increased. Some factories intend to shrink their sales policies for October, while others are temporarily observing. The supply side of BDO is expected to be affected by favorable factors.
On the cost side, raw material calcium carbide: The domestic calcium carbide market continues to show an upward trend, with production enterprises shipping smoothly and the overall market supply maintaining a tight pattern. Raw material methanol: The domestic methanol market continues to be weak. As of 10:00 am on September 19th, the reference price for domestic methanol in Taicang is 2270 yuan/ton. The raw material calcium carbide has seen an upward trend, while methanol has been weakly consolidated, and the impact on BDO costs is mixed.
On the demand side, downstream PTMEG production has slightly declined, while the capacity utilization rate of industries such as PBAT has increased, with no significant change in raw material digestion. Approaching the settlement cycle, downstream contract orders are following up or digesting inventory, and the enthusiasm for entering the market for procurement is currently average, with weak spot follow-up due to cost pressures. The demand side of BDO is affected by bearish factors.
In the future forecast, some load reduction devices will operate with increased load, and the supply of BDO will slightly increase; And the industry continues to suffer losses, with suppliers planning to shrink their sales policies to support the market. Downstream maintenance contract follow-up or inventory digestion. Business analyst BDO predicts that the supply and demand of the BDO market will increase, and the domestic BDO market situation will remain stagnant.

In 2025, China’s bisphenol A production capacity will continue to expand. The 180000 ton/year plant in Shandong and the 240000 ton/year plant in Zhenhai were put into operation in June and July respectively, driving further growth in domestic production. From January to August 2025, the cumulative production of bisphenol A in China reached 3.1541 million tons, a year-on-year increase of 12.01%.

The production from January to August 2025 will be 3.1541 million tons, an increase of 12% compared to the same period. With the increase in production, prices are under pressure and falling, especially starting from the second half of the year when new production capacity is added and supply increases. The increased supply is difficult to consume in stages, and price reductions are needed to relieve inventory pressure.
In the third quarter, the profit loss of bisphenol A was significant, and the company gradually reduced its burden and pressure. In addition, the planned maintenance time for the future has been moved forward, and the equipment maintenance is mainly concentrated from September to November. In the fourth quarter, it is expected that the 240000 tons/year bisphenol A equipment in Shandong will be launched. However, the production of new equipment is difficult to fully release, and the increase in supply is limited. It is expected that the monthly average production in the fourth quarter will be in the range of 395000 to 42000 tons.

This week, the phthalic anhydride market rebounded and adjusted

According to the Commodity Market Analysis System of Shengyi Society, as of September 15th, the price of phthalic anhydride in neighboring countries was 6300 yuan/ton, which rebounded from the price of 6133.33 yuan/ton on September 8th and increased by 2.72%. This week, the price of ortho benzene was 6400 yuan/ton, with a price increase of 1.59%. The price of industrial naphthalene fluctuated and rose, and the cost support of phthalic anhydride increased. The equipment load of phthalic anhydride increased this week, and the operating rate of phthalic anhydride enterprises increased. The supply of phthalic anhydride was sufficient, and the downstream plasticizer market fluctuated and consolidated. The equipment operating load of plasticizer enterprises remained high and consolidated, and the demand support for phthalic anhydride was limited. Due to limited demand support, the price of phthalic anhydride rebounded and rose this week.
Rising cost of phthalic anhydride
On September 15th, Sinopec’s ortho benzene quotation was 6400 yuan/ton, an increase of 1.59% compared to the ortho benzene quotation of 6300 yuan/ton on September 1st. The price of industrial naphthalene has fluctuated and risen, the price of ortho benzene has risen, and the cost of phthalic anhydride has increased. This week, the operating load of phthalic anhydride equipment has increased, the operating rate of phthalic anhydride enterprises has improved, and the supply of phthalic anhydride is sufficient.
Demand side: Downstream production increases, DOP prices stop falling and rebound
According to the Commodity Market Analysis System of Shengyi Society, as of September 15th, the DOP price was 7509.16 yuan/ton, a fluctuating increase of 0.56% compared to the DOP price of 7467.50 yuan/ton on September 10th. DOP prices have stopped falling and rebounded, DOP companies’ operating load has stabilized, demand for phthalic anhydride is temporarily stable, and support for phthalic anhydride price increases still exists.
Future forecast
According to the data analyst of Shengyi Society’s phthalic anhydride products, in terms of demand, plasticizer companies are stabilizing their production, plasticizer output is stable, and phthalic anhydride demand support still exists. In terms of cost, the price of ortho benzene has risen, the price of industrial naphthalene has fluctuated, and the cost of phthalic anhydride has increased. In the future, the cost of phthalic anhydride will increase, and it is expected that the price of phthalic anhydride will rebound and rise.

According to the Commodity Market Analysis System of Shengyi Society, from September 5th to 12th, the domestic ethanol price fell to 5558 yuan/ton, with a price drop of 0.29% during the period, a month on month drop of 1.71%, and a year-on-year drop of 6.41%. The domestic ethanol market continues to be weak, with factory quotations falling and overall demand being weak. At the same time, enterprise inventories are rising, and ethanol transaction prices are continuously declining.

On the cost side, the circulation of aged corn grains is low, and new grains are gradually being launched. At present, there is a shortage of sales in the production area, and the prices are firm, while the prices in the production area are gradually weakening. The cost of ethanol is influenced by bearish factors.
On the supply side, the impact of ethanol supply is mixed.
On the demand side, the demand side presents a differentiation pattern: the chemical downstream industry has recently seen production reduction or delayed commencement, while the demand of the Baijiu industry has maintained a moderate growth trend. In addition, due to logistics control measures in some regions, the efficiency of product transportation and delivery is limited to a certain extent. Negative factors affecting ethanol demand.
Future forecast: Ethanol production will continue to increase, but there will be an imbalance between supply and demand within the market, with supply exceeding demand. The downstream demand for Baijiu and chemical products is improving, and the consumer side is expected to improve. The ethanol analyst from Shengyi Society predicts that the short-term ethanol market will continue to operate weakly.

The price of isooctanol fluctuated and fell in September

According to the Commodity Market Analysis System of Shengyi Society, as of September 8th, the price of isooctanol was 7283.33 yuan/ton, a fluctuating decrease of 3.32% compared to the price of 7533.33 yuan/ton on August 1st. In September, the isooctanol enterprise’s equipment remained stable at a high level, with a 95% operating rate of isooctanol equipment. In addition, there was a significant increase in isooctanol production capacity, resulting in an increase in isooctanol supply; Downstream plasticizer companies have started production steadily, but the demand support for isooctanol by plasticizers is limited. The increase in supply and demand support is limited, and the price of isooctanol fluctuated and fell in September.
Downstream plasticizer DOP prices fluctuate and fall
According to the Commodity Market Analysis System of Shengyi Society, as of September 8th, the DOP price was 7517.50 yuan/ton, a fluctuating decrease of 0.94% compared to the DOP price of 7589.17 yuan/ton on September 1st. Cost reduction and increasing pressure for DOP decline; In September, the operating load of DOP enterprises stabilized, but the demand for isooctanol was insufficient, and the support for the price increase of isooctanol was limited.
Future expectations
According to the data analyst of Business Society’s octanol product, on the supply side, the equipment operating load of isooctanol enterprises remains stable at a high level, coupled with a large amount of new production capacity of isooctanol, resulting in an oversupply of isooctanol. In terms of demand, DOP prices have fluctuated and fallen, with insufficient support from isooctanol demand. In the future, the supply and demand of isooctanol will increase, and it is expected that the price of isooctanol will fluctuate and fall.