Benzidine Sulfate from Canada
Benzidine sulfate is the salt form of the aromatic polyamine benzidine, used in analytical chemistry and dye production. As a salt of an aromatic polyamine, it falls under HTS 2921.59.80 per Chapter 29 note 3(C)(1), classifying inorganic salts with organic amine compounds in the organic compound's heading.
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
• Specify salt formation details (sulfuric acid derived) and provide pH/stability data for classification confirmation
• Hazard labeling mandatory (carcinogen); mismatches cause exam/hold
• Avoid bulk water solutions; exceed Chapter 29 note (d) limits shift to mixtures