Xylene Sulfonic Acid from Japan
Xylene sulfonic acid mixture (ortho/para/mixed isomers) is an aromatic sulfonic acid per HTS 2904.10.32.00. Widely used as catalyst and hydrotrope base.
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 isomer ratio (typically 60% para) in COA
• pH 1-2 confirms acid strength for classification
• Stabilize against oxidation with trace inhibitors