Sodium Tetraphenylboron for Potassium Assay from Japan
Specialty sodium tetraphenylboron formulated for potassium assay kits in clinical and environmental labs, remains under HTS 2931.90.15.00 as the principal aromatic organo-inorganic compound. Its use as a precipitant aligns with chemically defined status in Chapter 29.
Duty Rate — Japan → United States
15.8%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include method validation references in import docs; ensure GMP compliance for lab-grade imports; test for moisture content to maintain efficacy during shipping