4-Nitrotoluene-2-sulfonic acid from China
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 — China → United States
43%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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