Bismuth Subnitrate Catalytic Promoter from Canada
Bismuth subnitrate used as promoter in automotive catalytic converters and NOx reduction systems. This basic bismuth nitrate qualifies under HTS 3815.90.1000 as wholly inorganic reaction accelerator. Enhances thermal stability of noble metal catalysts.
Duty Rate — Canada → United States
16.5%
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
• Thermal analysis (TGA/DSC) verifying decomposition profile typical of catalytic-grade material
• End-use statement specifying emission control application prevents reagent classification
• Particle size distribution critical for promoter dispersion in final catalyst formulation