Tetrabutylammonium Bromide (TBAB) from China
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 — China → United States
31.2%
Rate breakdown
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 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