Sodium 4,4'-Dinitrostilbene-2,2'-disulfonate from China
The sodium salt form of 4,4'-Dinitrostilbene-2,2'-disulfonic acid, where inorganic sodium pairs with the organic sulfonic acid. HTS 2904.99.35.00 applies per chapter note on inorganic salts of organic compounds classifying with the parent acid. Common form for dye intermediate applications.
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
• Include assay confirming sodium content and equivalence to parent disulfonic acid for proper 2904.99.35.00 classification
• Check for dual salt formation; complex salts follow the organic acid component per chapter notes
• Ensure no added functional groups that would change from sulfonated/nitrated hydrocarbon derivative