1-Butene (But-1-ene)
1-Butene is a colorless, flammable acyclic unsaturated hydrocarbon with the formula CH2=CH-CH2-CH3. It is a separate chemically defined isomer of butene, which falls under tariff item 2901.23.00 as an unsaturated acyclic hydrocarbon. It serves as a key monomer in producing linear low-density polyethylene (LLDPE) and other polymers.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is 1,3-butadiene, a diene with two double bonds
1,3-Butadiene is a separate acyclic hydrocarbon with two double bonds, classified under its own subheading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is a pure isomer (not a mixture) and provide a certificate of analysis to confirm its chemical identity
• Verify if the import requires a permit under the Chemicals Management Plan or other Canadian environmental regulations
• Classify accurately as 2901.23.00 to avoid penalties for misdeclaration
Related Products under Tariff item 2901.23.00
2-Butene Industrial Grade
Industrial 2-butene is a mixture of cis- and trans-2-butene isomers, both of which are acyclic unsaturated hydrocarbons with the formula CH3-CH=CH-CH3. As a mixture of isomers of the same organic compound, it qualifies under chapter note 1(b) and is classified under tariff item 2901.23.00. It is used in solvent production and alkylation processes.
Butene-1 Polymerization Grade
Butene-1 polymerization grade is high-purity 1-butene (>99.5%) specifically used as a comonomer in LLDPE production. As a separate chemically defined isomer of butene, it falls under tariff item 2901.23.00. The high purity ensures it meets the definition of a chemically defined compound under chapter note 1(a).
cis-2-Butene
cis-2-Butene is the cis stereoisomer of 2-butene, an acyclic alkene with the formula CH3-CH=CH-CH3. As a separate chemically defined isomer of butene, it is classified under tariff item 2901.23.00. It is used in organic synthesis and as a research chemical.
Isobutene (2-Methylpropene)
Isobutene, or 2-methylpropene (CH2=C(CH3)2), is a branched butene isomer and an acyclic unsaturated hydrocarbon. It is a separate chemically defined compound that falls under tariff item 2901.23.00. Its primary use is in manufacturing methyl tert-butyl ether (MTBE) and polyisobutylene.
Isobutylene Research Grade
Isobutylene research grade is ultra-high purity isobutylene (>99.99%) used for laboratory and pharmaceutical synthesis. As a separate chemically defined isomer of butene, it is classified under tariff item 2901.23.00. The high purity ensures it meets the definition of a chemically defined compound under chapter note 1(a).
trans-2-Butene
trans-2-Butene is the trans stereoisomer of 2-butene (CH3-CH=CH-CH3), a separate chemically defined compound. It falls under tariff item 2901.23.00 as an acyclic unsaturated hydrocarbon. It is commonly used in petrochemical research and isomerization studies.