Benzidine Dihydrochloride from Canada
Benzidine dihydrochloride is the salt form of the aromatic tetraamine benzidine, used historically in dye manufacturing. It falls under HTS 2921.59.80.90 per Chapter 29 note on organic salts classifying with parent amine. The hydrochloride salt maintains aromatic polyamine identity.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Benzidine derivatives require EPA TSCA Section 8(d) health/safety data submission
• Declare both free base equivalent and salt form concentrations on commercial invoice
• Special handling permits needed due to IARC Group 1 carcinogen classification