Toluene Sulfonic Acid Monohydrate from China
Para-toluene sulfonic acid monohydrate contains only sulfo groups on toluene hydrocarbon backbone. Fits HTS 2904.10.5000 as sulfonated hydrocarbon derivative. Used as catalyst in esterification and polymerization reactions.
Duty Rate — China → United States
39.2%
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
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
• Specify ortho/para isomer ratio; pure p-TSA vs mixed isomers affect pricing and classification
• Monohydrate status must be confirmed (<1.5% water distinguishes from anhydrous form)
• Avoid declaring as 'aromatic sulfonic acid' without hydrocarbon parent specification