Sodium Tetraphenylborate Analytical Grade from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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