2-Methyloxirane (Isobutylene Oxide) from Mexico
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 — Mexico → United States
14.6%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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