High Assay Tobias Acid 99.5% from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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