Buta-1,3-diene (1,3-Butadiene)
Buta-1,3-diene is a colorless, flammable gas with the molecular formula C4H6, classified as an acyclic unsaturated hydrocarbon under HTS 2901.24.10.00 due to its conjugated double bonds and four-carbon chain structure. It serves as the primary monomer for synthetic rubber production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If liquefied petroleum gas mixture containing butadiene
Butadiene in LPG mixtures or as fuel falls under Chapter 27 hydrocarbons rather than pure Chapter 29 chemicals.
If containing impurities exceeding chemically defined compound purity
Chapter 29 note (a) requires separate chemically defined compounds; impure forms may shift to other unsaturated hydrocarbons.
If mixed with polymers as processing aid
Mixed hydrocarbon preparations for rubber processing fall under heading 3817, not pure monomers.
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Import Tips & Compliance
• Verify purity levels (typically >99%) via Certificate of Analysis to confirm classification under pure butadiene heading
• Ensure proper DOT/UN 1010 hazardous material documentation and cryogenic storage compliance for gaseous imports
• Avoid misclassification as mixtures; even trace impurities must be documented if exceeding chapter note thresholds
Related Products under HTS 2901.24.10.00
Polymerization-Grade Butadiene (PG Butadiene)
High-purity buta-1,3-diene (>99.7%) specifically refined for synthetic rubber polymerization, falling under HTS 2901.24.10.00 as a pure acyclic unsaturated hydrocarbon. Its conjugated diene structure makes it ideal for producing styrene-butadiene rubber (SBR).
Refrigerated Liquid Buta-1,3-diene
Liquefied buta-1,3-diene stored at -4°C under pressure, classified under HTS 2901.24.10.00 per Chapter 29 note (e) as solvent-free pure compound in transport form. Used primarily in tire manufacturing as synthetic rubber feedstock.
99.9% Pure Butadiene Monomer
Ultra-high purity buta-1,3-diene monomer (>99.9%) for specialty polymer applications, classified as chemically defined acyclic hydrocarbon under HTS 2901.24.10.00. Meets Chapter 29 note (a) strict purity standards.
Extracted C4 Butadiene Fraction
Buta-1,3-diene recovered via extractive distillation from C4 steam cracker raffinate, purified to chemical compound standards under HTS 2901.24.10.00. Primary use in nitrile rubber production.
Synthetic Rubber Feedstock Butadiene
Industrial-grade buta-1,3-diene specifically for polybutadiene rubber (PBR) production, classified under HTS 2901.24.10.00 as pure unsaturated acyclic hydrocarbon. Features low acetylene content (<20 ppm).