Cesium Tetraphenylborate from Mexico
Cesium tetraphenylborate is a complex cyanide used in analytical chemistry for cesium detection. Though containing organic phenyl groups, it classifies under HTS 2837.20.51.00 as a complex cyanide of inorganic cesium base per Chapter notes.
Duty Rate — Mexico → United States
11.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit detailed molecular formula and CAS number; ensure lab-use declaration
• Common issue: organic content leading to Chapter 29 scrutiny