4,4'-Dinitrostilbene-2,2'-disulfonic acid, 85% purity from China
Technical grade 4,4'-Dinitrostilbene-2,2'-disulfonic acid at 85% purity with minor impurities, still recognized as the specific compound. Falls under HTS 2904.99.35.00 per chapter note (a) allowing impurities in chemically defined compounds. Used in industrial dye manufacturing processes.
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
• Submit CoA specifying minimum 85% purity and impurity profile to confirm classification under specific 2904.99.35.00 subheading
• Label containers clearly with chemical name, CAS number (128-41-6), and hazard warnings for safe transport
• Avoid over-dilution; concentrations above normal transport levels may reclassify as preparations under 3824