Tripolite Ceramic Block from Canada
Heavy-duty ceramic block made from tripolite, a siliceous fossil earth similar to diatomite, used in furnace construction. HTS 6901.00.00.00 covers such goods explicitly including 'similar siliceous earths' that are shaped and fired.
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
• Submit geological source documentation proving tripolite origin as a siliceous fossil meal
• Declare exact firing temperature (>800°C) to distinguish from cured resin products excluded by Chapter notes
• Use separate invoices for mixed fossil meal/clay shipments to avoid misclassification