o-Tolidine (3,3'-Dimethylbenzidine) from Canada
o-Tolidine, or 3,3'-dimethylbenzidine, is an aromatic polyamine derivative used in dye manufacturing and as a chemical intermediate. It qualifies for HTS 2921.59.80 as an 'other' aromatic polyamine not specified in earlier subheadings, consistent with Chapter 29's rule for classification in the last applicable numerical 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
• Provide CAS number (119-93-7) and spectral analysis to confirm identity and purity >98% for Chapter 29 eligibility
• Declare as a P-listed RCRA hazardous waste if residues generated; include waste management certifications