Sodium Tetraphenylborate Analytical Grade from China
High-purity sodium tetraphenylborate (NaBPh4) in analytical grade, a white crystalline powder used for gravimetric determination of potassium in lab settings, falls under HTS 2931.90.15.00 due to its aromatic organo-inorganic nature with direct boron-carbon bonds. It meets Chapter 29 note (a) as a separate chemically defined compound.
Duty Rate — China → United States
18.3%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include SDS (Safety Data Sheets) and lot-specific purity certificates; declare exact CAS number 143-66-8 for customs verification; avoid bulk packaging over transport limits to prevent hazmat surcharges