2-Methyloxirane (Isobutylene Oxide)
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing additional heterocyclic structures
If the molecule includes other heterocyclic rings beyond the simple three-membered epoxide, it falls under heading 2932 per chapter exclusion notes.
If diluted for retail or lab use
Epoxides put up in retail packings or as lab reagents often classify as chemical preparations rather than pure compounds.
If for epoxyalcohols without saturated ring
Related epoxyalcohol derivatives without the strict three-membered ring classification may classify in earlier ether headings.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• 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
Related Products under HTS 2910.90.10.00
Butylene Oxide (1,2-Epoxybutane)
Butylene oxide is a three-membered ring epoxide compound (1,2-epoxybutane) classified under HTS 2910.90.10.00 as it fits the chapter definition for separate chemically defined organic epoxides with a three-membered ring. It is primarily used as a reactive intermediate in organic synthesis for producing glycol ethers and surfactants.
Butylene Oxide Technical Grade 99%
Technical grade butylene oxide at 99% purity is a chemically defined epoxide with a three-membered ring, qualifying under HTS 2910.90.10.00 per chapter note (a) allowing minor impurities. Commonly used in industrial production of propylene glycol ethers.
1,2-Epoxy-2-Methylpropane
1,2-Epoxy-2-methylpropane is a specific butylene oxide isomer featuring the required three-membered epoxide ring, classified under HTS 2910.90.10.00. It functions as a versatile alkylating agent in fine chemical manufacturing.
Butylene Oxide with Stabilizer
Stabilized butylene oxide contains added preservatives necessary for transport while maintaining its identity as a chemically defined three-membered ring epoxide under HTS 2910.90.10.00 per chapter note (f). Used in polymer initiator production.