High Assay Tobias Acid 99.5% from Canada
Premium 99.5% assay Tobias acid for direct black dye synthesis. Meets Chapter 29 criteria as separate chemically defined compound under HTS 2921.45.90.10. Low isomer content <0.1%.
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
• HPLC chromatogram required showing <0.05% β-naphthylamine (carcinogen)
• ICH Q3C residual solvent limits strictly enforced
• NMT 50 ppm iron; stainless steel manufacturing equipment verification