Calcium Boride Crystals from Mexico
Calcium boride (CaB6) crystals used in refractory materials and neutron absorbers for nuclear applications. Falls under HTS 2850.00.0500 as a chemically defined boride of calcium. Known for high hardness and thermal stability.
Duty Rate — Mexico → 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
• Submit crystallographic data if claiming single crystals to justify chemical definition
• For nuclear end-use, prepare IAEA safeguards documentation preemptively
• Avoid retail packaging that might trigger 3824 classification for lab reagents