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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 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