Kyanite Flour -325 Mesh from Mexico
Ultra-fine kyanite flour (-325 mesh, <44 microns) used as filler in porcelain insulators and spark plugs. Classified under HTS 2508.50.00.00 as ground kyanite, not chemically modified.
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
• Particle size analysis (laser diffraction) required to distinguish from chamotte (HTS 2508.70)
• Dust hazard declarations for fine powders; ensure proper UN packaging certification
• Avoid 'frit' terminology which could trigger Chapter 68 glass classification