Tetrabutylammonium Bromide (TBAB) from Mexico
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 — Mexico → United States
16.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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