Triisobutylaluminum from Germany
Triisobutylaluminum ((iBu)3Al) is a pyrophoric organoaluminum cocatalyst for Ziegler-Natta polymerization with Al-C bonds qualifying for 2931.90.90. Excluded from inorganic aluminum (Ch28) by chapter organo-inorganic definitions.
Duty Rate — Germany → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• UN3052 Pyrophoric aluminum alkyls; requires custom pressure-rated containers
• Polymerization catalyst—end-user verification prevents diversion to explosives
• Thermal decomposition hazard; shipping papers must specify max temperature