Ultra-Fine Boron Carbide Nanopowder <500nm from China
Nanoscale boron carbide powder with average particle size <500nm for advanced composites and coatings. Meets HTS 2849.90.10.00 criteria as chemically defined boron carbide nanomaterial.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include TEM/SEM analysis confirming particle size distribution for nanomaterial classification
• Declare surface area (BET method) as >10 m²/g distinguishes from conventional powders
• Special handling for inhalation hazards; require NIOSH-approved respirators