Toluene Sulfonic Acid (TsOH) from China
P-toluene sulfonic acid is a strong organic acid derived from toluene via sulfonation, containing only sulfo groups on an aromatic ring. Classified in HTS 2904.10.37.00 as an other aromatic sulfonated hydrocarbon derivative. Commonly used as a catalyst in esterification and polymerization reactions.
Duty Rate — China → United States
40.5%
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
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 monohydrate vs anhydrous form in documentation; both classify here but affect pricing/handling
• Provide NMR or GC-MS analysis confirming single sulfo group substitution on toluene structure
• Avoid packaging that suggests specific end-use beyond general chemical applications to prevent reclassification