Trimethylindium Precursor from Japan
Trimethylindium (TMIn) is a volatile organo-indium compound used in metal-organic chemical vapor deposition (MOCVD) for semiconductor production. Classified under 2931.90.90.52 as an organo-inorganic compound with direct indium-carbon bonds, fitting Chapter 29 definitions excluding sulfonated/halogenated derivatives.
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
• Ship under UN 3058 as pyrophoric liquid; require specialized hazmat packaging and carrier approvals
• Provide certificates of analysis confirming >99% purity to avoid duty disputes
• Comply with Wassenaar Arrangement export controls for semiconductor precursors