The Ministry of Commerce of China announced on Monday the imposition of temporary anti-dumping measures against dichlorosilane (DCS) imported from Japan. This decision followed a preliminary finding that the product was being sold in the Chinese market at dumping prices.
According to China's anti-dumping regulations, importers are now required to provide monetary deposits to the Chinese customs. The size of these deposits will range from 80.8% to 99.2%, depending on the margin coefficient established for each company. These requirements take effect on September 8, 2026.
The investigation began on January 7, 2026, after an application was submitted by domestic industry. The review was conducted in strict accordance with Chinese laws, regulations, and World Trade Organization rules.
A ministry representative stated that preliminary data demonstrated that the dumped imports from Japan caused significant material damage to the local industry, and a causal link between this dumping and the damage was established.
The ministry representative added that China is exercising caution and restraint in applying trade regulation measures while maintaining commitment to the principles of free and fair trade. The Ministry will continue the investigation within the law, ensuring full protection of the rights of all interested parties, and will issue an objective and fair final decision based on the results obtained.
DCS is a critical material for microchip manufacturing, where it is predominantly used in thin-film deposition processes—such as epitaxial films, silicon carbide films, silicon nitride films, silicon oxide films, and polysilicon—for producing logic, memory, and analog chips. Furthermore, it is used in the synthesis of silicon-containing precursors and polysilanes.