Zinc Dust for Chemical Precipitations from Mexico
Ultra-fine zinc dust, condensed from vapor with spherical particles where 85% pass 63-micron mesh and containing 88% metallic zinc, used in chemical reactions for precipitating metals from solutions. Falls under 7903.10.00.00 per official definition distinguishing it from coarser powders.
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
• Submit sieve analysis and zinc purity assays; customs often tests samples for note (c) compliance
• Avoid generic 'zinc powder' labeling—specify 'zinc dust' with production method to prevent reclassification
• For hazardous material declarations, classify as UN 1436 to comply with DOT/IMDG shipping rules