Lignin Sulfonate Sodium Salt from Canada
Sodium lignosulfonate from sulfite pulping of wood contains phenolic sulfo groups, classified as a sulfonated phenol derivative under HTS 2908.99.1500 when meeting chemical purity standards. Used as binder in concrete and dispersant.
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
• Provide sulfomethylation degree analysis (>15%); ensure <5% carbohydrates
• Common error: Polymer classification under 3913 if molecular weight >10,000 Da