Diatomaceous Earth Firebrick from Germany
A high-temperature resistant brick made from diatomaceous earth (kieselguhr), a siliceous fossil meal, shaped and fired for use in industrial furnaces and kilns. It falls under HTS 6901.00.00.00 as a ceramic good specifically of siliceous fossil meals, providing superior insulation due to its low thermal conductivity.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Verify composition certificates confirming siliceous fossil meal content like kieselguhr to avoid reclassification to clay-based bricks
• Provide firing process documentation proving temperatures exceeded 800°C per Chapter 69 notes
• Check for uniformity in density and absorption to prevent disputes over 'similar siliceous earths' classification