Methyloxirane (Propylene Oxide) from Japan
Propylene oxide is three-membered epoxide with methyl substitution and oxygen hetero-atom, epoxidation agent. Classified 2932.99.90 despite general epoxide exclusion due to substitution. Industrial chemical staple.
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
• UN1280; tertiary butyl catechol inhibitor mandatory
• Epoxide oxygen equivalent weight certification
• Polyol production end-use common; pure monomer docs