International News - Brazil has canceled the temporary anti-dumping tax on nylon filament imported from China, specifically from Yiwu Huading Nylon Co. Ltd. This decision was made by the Brazilian Foreign Trade Commission (GECEX) due to public interest and is effective immediately [1]. Domestic News - The price of lithium hexafluorophosphate, a key raw material for lithium batteries, has surged dramatically, exceeding 170,000 yuan per ton. This represents an increase of over 240% compared to the year's low of 47,000 yuan per ton recorded in July [1]. - The market prices for polypropylene and polyethylene as of December 11 are as follows: - Polypropylene prices range from 5,900 to 6,900 yuan per ton across various regions [2]. - Polyethylene prices range from 6,540 to 10,250 yuan per ton, depending on the type and region [2]. - The market prices for gasoline and diesel on December 11 are reported as follows: - Gasoline prices range from 7,239 to 7,633 yuan per ton [2]. - Diesel prices range from 6,421 to 6,700 yuan per ton [2]. - The market prices for caustic soda on December 11 show a range of 720 to 1,310 yuan per ton, depending on the concentration and region [3]. - Methanol prices on December 11 vary from 1,520 to 2,270 yuan per ton across different markets [4]. - The prices for various chemical commodities on December 11 indicate slight fluctuations, with sulfuric acid priced between 985 and 1,045 yuan per ton, and acetone ranging from 4,060 to 4,130 yuan per ton [5].

Core Viewpoint - TDI (Toluene Diisocyanate) prices have experienced fluctuations this year, rising significantly after a low in April, driven by supply constraints and increased demand, particularly due to external factors affecting production capacity [1][2][3]. Group 1: Price Trends - TDI prices rose from below 10,000 yuan/ton in April to a peak of 17,000 yuan/ton in July, before retreating to around 15,000 yuan/ton in August [1][4]. - The price increase in July was approximately 6,000 yuan/ton, attributed to supply tightness and increased export volumes [1][3]. Group 2: Supply Constraints - Supply disruptions have been significant, with major producers like Covestro and BASF facing production halts due to various incidents, leading to a global supply reduction of about 16% [2][3]. - Covestro announced a 10% reduction in supply to China to support the European market, following a previous warning about supply tightness [1][4]. Group 3: Demand Dynamics - Demand for TDI has unexpectedly increased, with a reported 83% year-on-year growth in TDI exports from China in the first half of 2025, driven by U.S. tariff policies [3]. - The primary consumption sectors for TDI include soft foam (73%) and coatings (over 17%), with significant applications in furniture, construction, and transportation [5][6]. Group 4: Market Outlook - Analysts suggest that while current price declines may continue, the fundamental market conditions, including inventory dynamics and export expectations, could lead to a rebound in prices [6][7]. - Historical context indicates that TDI prices have previously experienced significant volatility, with past peaks reaching as high as 55,000 yuan/ton in 2016-2017 due to supply reductions and rising demand [7].