Toluene Sulfonic Acid (TsOH) from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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