Trimethyl Bismuth from China
Trimethyl bismuth (Bi(CH3)3) is a volatile organobismuth compound with bismuth-carbon bonds, used in MOCVD semiconductor manufacturing. Classified under 2931.90.90 as other organo-inorganic compounds per chapter notes defining heading 2931 for metal-carbon linkages. Excluded from organosulfur (2930) or heterocyclic categories.
Duty Rate — China → United States
28.7%
Rate breakdown
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)
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
• Provide CVD process end-use documentation; may qualify for duty-free research exemptions under HTSUS
• Flammable solid—requires DOT SP 188 or UN-approved packaging with proper hazard class labeling
• Check REACH compliance if transshipping through EU; bismuth compounds increasingly scrutinized