China’s Ministry of Commerce has issued a preliminary ruling in its antidumping investigation of dichlorosilane (DCS) imports from Japan, as per Chemweek.
The investigation, launched on Jan. 7, 2026, examined whether imports of DCS — a key material used in semiconductor manufacturing — were being dumped in the Chinese market, and whether such dumping caused material injury to China’s domestic industry.
The ministry said China will impose provisional antidumping measures in the form of security deposits, effective Sept. 8, 2026. Under the decision, Shin-Etsu Chemical Co. will face a deposit rate of 99.2%, while Denal Silane Co. will be subject to an 80.8% rate. Other Japanese suppliers will face deposits of 99.2%.
The ministry said DCS is a colorless, flammable and toxic gas with a purity above 99%. It is primarily used in semiconductor chip manufacturing for thin film deposition, including epitaxial, silicon carbide, silicon nitride, silicon oxide, and polysilicon films, as well as in the synthesis of silicon-based precursors and polysilazanes.
The product is classified under China’s import and export tariff code 28539090, with other products under the same code not included in this investigation.
Interested parties have 10 days from the date of the announcement to submit written comments to the ministry, it added.
mrchub.com