Toluene Sulfonic Acid Monohydrate from Mexico
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 — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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