4-Nitrotoluene-2-sulfonic acid from Canada
4-Nitrotoluene-2-sulfonic acid contains a nitro group para to the methyl and sulfonic acid ortho to methyl on the toluene ring, qualifying as a nitrotoluenesulfonic acid under HTS 2904.99.20.00. This sulfonated, nitrated hydrocarbon derivative aligns with Chapter 29 definitions for separate chemically defined compounds. Commonly serves as precursor in azo dye manufacturing.
Duty Rate — Canada → United States
15.5%
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
• Register compound under TSCA if new to US inventory to avoid EPA detention at entry
• Use GHS-compliant labeling for sulfonic acid corrosivity; common error is insufficient spill containment docs
• Confirm exact isomer via NMR/GC-MS; misidentification leads to wrong subheading