Flame Retardant Zinc Dust Filler from Canada
Zinc dust acting as synergist in intumescent flame retardants for polymers, vapor-produced with 85% min Zn and 80% particles through 63-micron mesh. Pure form qualifies under HTS 7903.10.00.00 zinc dust definition.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Test for halogen content; synergist role must not imply chemical treatment
• UL certification supports purity claims during entry
• Bulk bag imports need dust suppression systems