Tetrabutylammonium Bromide (TBAB) from Germany
Tetrabutylammonium bromide is a phase-transfer catalyst and ionic liquid precursor used in organic synthesis. This quaternary ammonium salt is classified under HTS 2923.90.0100 as a chemically defined organic compound with the characteristic quat structure. Chapter notes prioritize the last numerical heading for such salts.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Supply Certificate of Analysis (COA) confirming >98% purity for lab chemical status
• Small quantities for R&D may qualify for duty relief under HTS provisions
• Prevent misclassification by specifying non-mixture status