Core Points - The Conference of the Parties to the Minamata Convention on Mercury concluded in Geneva, Switzerland, with over 150 countries, including China, agreeing to gradually ban mercury-containing dental materials to reduce mercury pollution and protect public health [1] - Mercury-containing materials have been widely used in dental restoration due to their low cost and ease of shaping, but mercury can enter the human body through vapor, food chains, or water bodies [1] - The decision indicates that by 2034, mercury-containing dental materials will be completely phased out, despite the dental sector representing only a small portion of global mercury usage [1] - There was debate on the timeline for the complete phase-out of mercury dental materials, with African nations advocating for a 2030 deadline, but a consensus was reached to set the final deadline at 2034 [1] Additional Resolutions - In addition to dental materials, the conference adopted over 20 supplementary resolutions related to mercury management, including restrictions on the use of mercury in cosmetics and small-scale gold mining [2] - The common goal of these measures is to gradually eliminate the use and release of this toxic element globally [2]

Core Viewpoint - The conference on the Minamata Convention on Mercury concluded in Geneva, where over 150 countries, including China, agreed to phase out mercury-containing dental materials by 2034 to reduce mercury pollution and protect public health [1][2]. Group 1: Mercury in Dental Materials - Mercury-containing materials have been widely used in dental repairs due to their low cost and ease of shaping, but they pose health risks as mercury can enter the human body through vapor, food chains, or water [1]. - The decision to phase out these materials reflects a growing international concern over the dangers of mercury, highlighted by historical incidents such as the Minamata disease in Japan, which was officially recognized in 1956 [1]. - The resolution indicates that while dental mercury alloys represent a small portion of global mercury usage, their direct contact with humans necessitates a gradual cessation of production, import, export, and clinical use over the next decade [1]. Group 2: Additional Resolutions - In addition to dental materials, the conference adopted over 20 supplementary resolutions aimed at restricting mercury use in cosmetics and small-scale gold mining, with the overarching goal of eliminating the use and emissions of this toxic element globally [2].

Core Viewpoint - The Chinese government is actively fulfilling its commitments under the Minamata Convention on Mercury, emphasizing the need for the PVC industry, particularly the acetylene method, to undergo transformation and upgrade due to environmental pressures and supply-demand imbalances [1][2][3] Group 1: Environmental Pressure - The Minamata Convention, effective since August 16, 2017, aims to control and reduce mercury emissions, with the acetylene method for PVC production using mercury chloride as a catalyst, accounting for approximately 60% of national mercury usage [1] - The deadline for the complete ban on primary mercury mining is approaching in 2032, posing a risk of forced exit for acetylene method PVC companies that fail to upgrade to mercury-free technologies [1] - The acetylene method is characterized by high energy consumption, requiring 8,500 kWh of electricity to produce one ton of PVC, and has been listed in the "High Pollution Process Elimination Directory" by the National Development and Reform Commission, mandating a 50% capacity replacement by 2027 [1] Group 2: Supply-Demand Imbalance - The PVC industry has been facing low profit margins due to supply-demand imbalances, exacerbated by the bundling of caustic soda profits, leading to high PVC inventory levels, which increased by 24.48% year-on-year as of October 2025 [2] - The real estate market's deep adjustments have significantly impacted demand, resulting in low PVC prices, while acetylene method producers have been suffering losses due to low calcium carbide prices [2] - New PVC production capacity is expected to add 2.5 to 3.5 million tons in 2023, bringing total domestic capacity to around 30 million tons, further worsening the supply-demand imbalance [2] Group 3: Industry Restructuring - The PVC industry is experiencing a squeeze effect, with the ethylene method gradually capturing market share from the acetylene method, which has historically dominated with 70-80% of total capacity [3] - The cost structure of the ethylene method is more favorable in the current low international oil price environment, leading to a significant increase in new capacity for this method, which is expected to account for over 70% of new capacity in 2023 [3] - By 2030, the ethylene method's capacity share is projected to rise to around 40%, intensifying competition for acetylene method PVC producers [3]

Group 1 - The core point of the article highlights the urgent need for the calcium carbide method PVC industry to undergo transformation and upgrade due to environmental pressures and supply-demand imbalances [1][2][3] Group 2 - The Minamata Convention on Mercury, effective since August 16, 2017, aims to control and reduce mercury emissions, with the calcium carbide method PVC industry being a key area of focus [1] - The calcium carbide method uses mercury chloride as a catalyst, accounting for approximately 60% of the total mercury consumption in the country, facing mandatory upgrades to avoid forced exit as the 2032 deadline for banning native mercury mining approaches [1] - The National Development and Reform Commission has listed the calcium carbide method PVC in the "High Pollution Process Elimination Directory," requiring a 50% capacity replacement by 2027 [1] - PVC industry has been suffering from low profits due to supply-demand imbalances, with domestic PVC social inventory increasing by 24.48% year-on-year as of October 2025 [2] - The real estate market's deep adjustment has led to significant supply-demand imbalances, causing PVC prices to remain low [2] - New PVC production capacity is expected to reach 2.5 to 3.5 million tons this year, bringing total domestic PVC capacity to around 30 million tons, further exacerbating the supply-demand imbalance [2] - The market is experiencing a squeezing effect, with the ethylene method gradually taking market share from the calcium carbide method, which has historically dominated the PVC industry [3] - Ethylene method PVC production is expected to account for about 40% of total capacity by 2030, driven by cost advantages and environmental pressures [3] - The combination of environmental regulations, supply-demand imbalances, and competitive pressures will accelerate the elimination of inefficient capacities in the calcium carbide method PVC industry, pushing towards a more environmentally friendly and ethylene-based production structure [3]