Kieselguhr Catalyst Support Brick from Canada
Ceramic brick from kieselguhr used as inert support for chemical catalysts in reactors. Falls under HTS 6901.00.00.00 for ceramic goods of siliceous fossil meals.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide chemical inertness certificates for catalyst bed applications
• Declare industrial end-use to avoid consumer article shifts
• Test for >95% silica content from fossil sources