Dinas Fire-Clay Earth from China
Dinas earths are siliceous fire-clays used in high-temperature silica bricks for coke ovens. Classified under HTS 2508.30.00.00 as fire-clay variants like chamotte or dinas. Known for low flux content and purity.
Duty Rate — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Certify silica content (88-98%) to differentiate from alumina fire-clays
• Avoid bulk shipments mixed with mullite, risking subheading disputes
• Ensure no prior agglomeration, as built-up products go to 6815