Buta-1,3-diene and isoprene
Acyclic hydrocarbons. > Unsaturated: > Buta-1,3-diene and isoprene > Buta-1,3-diene and isoprene
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2901.24.00
99.9% Pure Butadiene Monomer
Ultra-high purity buta-1,3-diene monomer (>99.9%) is a separate chemically defined organic compound, meeting the strict purity standards of Chapter 29 Note 1(a). Its conjugated double bonds and four-carbon chain classify it as an unsaturated acyclic hydrocarbon under tariff item 2901.24.00.
99.9% Spectroscopic Grade Isoprene
Ultra-high purity 99.9% isoprene for spectroscopic and analytical applications is a separate chemically defined organic compound, free of UV-absorbing impurities. It is classified under tariff item 2901.24.00 as an acyclic unsaturated hydrocarbon, specifically as isoprene.
99% Pure Isoprene Monomer
High-purity isoprene (2-methyl-1,3-butadiene) used as a key monomer in synthetic rubber production is an acyclic unsaturated hydrocarbon. It is classified under tariff item 2901.24.00 as a separate chemically defined compound, not as 'other' isoprene.
Battery Electrolyte Grade Isoprene Derivative (96%)
96% pure isoprene used in producing electrolyte additives for lithium-ion batteries is a separate chemically defined acyclic hydrocarbon. Despite being below 99% purity, it meets the threshold for a chemically defined compound and is classified under tariff item 2901.24.00.
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 tariff item 2901.24.00 due to its conjugated double bonds and four-carbon chain structure. It is a separate chemically defined compound per Chapter 29 Note 1(a).
Elastomer Feedstock Isoprene (99.2%)
99.2% isoprene feedstock for elastomer production is a highly refined acyclic unsaturated hydrocarbon. It qualifies as a separate chemically defined compound under Chapter 29 Note 1(a) and is classified under tariff item 2901.24.00.
Extracted C4 Butadiene Fraction
Buta-1,3-diene recovered via extractive distillation from C4 steam cracker raffinate, purified to chemical compound standards, is a separate chemically defined organic compound. Its primary use in nitrile rubber production aligns with the acyclic unsaturated hydrocarbon classification of tariff item 2901.24.00.
High-Purity Isoprene (99.5%)
Isoprene (2-methyl-1,3-butadiene) with a purity of 99.5% by weight is a chemically defined acyclic unsaturated hydrocarbon used primarily as a monomer in synthetic rubber production. It is classified under tariff item 2901.24.00.
Industrial High-Purity Isoprene (97%)
97% pure isoprene for large-scale industrial polymerization is distilled to exceed the 95% threshold with controlled cyclopentadiene content. It is a separate chemically defined acyclic hydrocarbon, classified under tariff item 2901.24.00.
Pharma Intermediate Isoprene (98.5%)
98.5% pure isoprene serving as an intermediate for pharmaceutical terpenoid synthesis is a high-purity acyclic unsaturated hydrocarbon. It meets the USP-compliant purity standards and is classified under tariff item 2901.24.00.
Polymerization-Grade Butadiene (PG Butadiene)
Polymerization-grade butadiene (>99.7%) is a high-purity acyclic unsaturated hydrocarbon refined for synthetic rubber polymerization. Its conjugated diene structure and purity qualify it as a separate chemically defined compound under tariff item 2901.24.00.
Polymerization-Grade Isoprene (98%)
98% pure isoprene specifically refined for synthetic rubber polymerization meets industrial standards for cis-1,4-polyisoprene production. It is a high-purity acyclic unsaturated hydrocarbon, classified under tariff item 2901.24.00.
Refrigerated Liquid Buta-1,3-diene
Liquefied buta-1,3-diene stored at -4°C under pressure is a pure compound in a transport form, consistent with Chapter 29 Note 1(e) as a normal method for safety and transport. It is classified under tariff item 2901.24.00 as an acyclic unsaturated hydrocarbon.
Synthetic Rubber Feedstock Butadiene
Industrial-grade buta-1,3-diene for polybutadiene rubber production, with low acetylene content (<20 ppm), is a separate chemically defined compound. Its high purity and specific use qualify it under tariff item 2901.24.00 as an unsaturated acyclic hydrocarbon.
Synthetic Rubber Monomer Isoprene (99%)
99% pure isoprene used exclusively as a building block for cis-polyisoprene synthetic rubber, with minimal impurities, qualifies as a separate chemically defined compound. It is classified under tariff item 2901.24.00 as an acyclic unsaturated hydrocarbon.