Sodium 4,4'-Dinitrostilbene-2,2'-disulfonate from Canada
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 — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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