2-Methyloxirane (Isobutylene Oxide) from Japan
2-Methyloxirane, also known as isobutylene oxide, is a branched epoxide with a three-membered ring, directly matching HTS 2910.90.10.00 for butylene oxide specifications. It serves as a key intermediate in manufacturing pharmaceuticals and polymer additives.
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
• Include NMR or GC-MS spectra confirming structure as butylene oxide isomer to prevent misclassification as generic epoxides
• Use child-resistant packaging and include GHS labels for epoxide reactivity and flammability risks
• Avoid importing stabilized mixtures without verifying if stabilizers trigger classification under note (f) as preserved products