China’s Ministry of Commerce announced preliminary anti-dumping measures on Japanese dichlorosilane (DCS) on September 7, 2026. Importers must pay cash deposits starting September 8, 2026, to bring the material into the country.
The deposit rates are set at 99.2% for Shin-Etsu Chemical and most other Japanese producers, while Denal Silane faces an 80.8% rate. The investigation began on January 7, 2026, following a request from Tangshan Sanfu Electronic Materials Co.
Authorities analyzed import data from July 1, 2024, to June 30, 2025. They identified a trend of increasing import volumes alongside a 31% cumulative price drop between 2022 and 2024, which officials deemed harmful to domestic producers.
DCS is a vital chemical used in chemical vapor deposition for semiconductor manufacturing. These measures follow Japan’s alignment with US and Dutch export controls on advanced chipmaking technology.
A final ruling on the anti-dumping duties is scheduled for January 7, 2027, with a possible six-month extension. The high deposit rates effectively make further exports of the chemical to China economically unviable for Japanese firms.
