Triisobutylaluminum from China
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 — China → United States
41.2%
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
9903.88.0425%Except as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)
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