September 8, 2026 — The commerce ministry of the Mainland Chinese Communist Government began collecting provisional anti-dumping deposits on imports of dichlorosilane from Japan, a chemical used in semiconductor manufacturing.
The ministry’s Announcement No. 37 states that its preliminary investigation found dumping, material injury to the mainland industry, and a causal relationship. Those are the investigating authority’s preliminary determinations, not a final adjudication.
Importers must provide deposits at rates of 99.2 percent for Shin-Etsu Chemical, 80.8 percent for Denal Silane, and 99.2 percent for other Japanese suppliers. The measure took effect September 8. Interested parties have 10 days from the announcement to submit written comments.
Why the material matters
Dichlorosilane is used in thin-film deposition for logic, memory, analog and other chips. Because the measure concerns a specialized upstream input, its practical effect depends on sourcing patterns, inventories, contractual arrangements and whether the preliminary rates survive the final investigation.
Japan’s economy ministry said the government had objected and was assessing a response. Associated Press reporting separately described Tokyo’s protest. The available record does not establish that the trade-remedy case was retaliation for another dispute.
For a sourced examination of the supply-chain implications, see our analysis.