Cryogenic liquid ethylene is ethylene (C2H4) in a liquefied state at very low temperatures for bulk transport. It is a separate chemically defined organic compound, and its physical state does not affect its classification under tariff item 2901.21.00.

2901.21.00

Ethylene Calibration Gas 1.0%

This product is a mixture of 1.0% ethylene in nitrogen, used as a calibration gas. It is not a separate chemically defined compound, and the nitrogen solvent is not for safety or transport but for a specific analytical use, so it does not meet Chapter 29 criteria. It is excluded from this heading.

2901.21.00

Ethylene for Ethylbenzene Production

Ultra-high purity ethylene (99.99%) for ethylbenzene production is a separate chemically defined organic compound. Its intended use in styrene synthesis does not alter its classification as ethylene under tariff item 2901.21.00.

2901.21.00

Ethylene for Fruit Ripening (Technical Grade)

Technical grade ethylene (98%+) for fruit ripening is a separate chemically defined organic compound, even with impurities. The impurities do not make it a mixture of isomers or a product of other headings, so it falls under tariff item 2901.21.00.

2901.21.00

Ethylene for LDPE Autoclave Process

Specially purified ethylene for LDPE autoclave processes is a separate chemically defined organic compound. The low metal and sulfur content are impurities, not additives, so it remains classified under tariff item 2901.21.00.

2901.21.00

Medical Grade Ethylene for Anesthesia

Medical grade ethylene for anesthesia is a separate chemically defined organic compound. Its pharmaceutical grade and use do not change its classification under tariff item 2901.21.00, as Chapter 29 covers such compounds regardless of purity.

2901.21.00

Polymer Grade Ethylene

Polymer grade ethylene (99.9%+) is a separate chemically defined organic compound used as a monomer. It is not a polymer itself, so it is correctly classified under tariff item 2901.21.00 as an unsaturated acyclic hydrocarbon.

2901.21.00

Research Grade Ethylene 99.999%

Research grade ethylene (99.999%) is a separate chemically defined organic compound. Its high purity and laboratory use do not affect its classification, and it falls under tariff item 2901.21.00.

2901.21.00

Vinyl Chloride Monomer Feedstock Ethylene

High-purity ethylene for vinyl chloride monomer production is a separate chemically defined organic compound. The low moisture specification is an impurity, not an additive, so it remains classified under tariff item 2901.21.00.

2901.22.00

Chemical-Grade Propylene

Chemical-grade propylene is a separate chemically defined acyclic unsaturated hydrocarbon, specifically propene, with a purity of 99% or higher. It is used as a feedstock in the production of oxo-alcohols and acrylic acid, and qualifies under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Electronic-Grade Propylene

Electronic-grade propylene is ultra-pure propene (greater than 99.99% purity) used in semiconductor precursor synthesis and specialty polymer production. It is a separate chemically defined compound, meeting the requirements of tariff item 2901.22.00 for propene (propylene).

2901.22.00

High-Purity Propylene USP

High-purity propylene USP is pharma-grade propene meeting United States Pharmacopeia standards, used as a medical propellant or precursor in synthesis. It is a separate chemically defined compound and falls under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Isomeric Pure Propene

Isomeric pure propene is a mixture of propene stereoisomers, chemically defined and free of acyclic hydrocarbon impurities. It is used in specialty fine chemical synthesis and qualifies under tariff item 2901.22.00 as propene (propylene) per chapter note 1(b).

2901.22.00

Polymer-Grade Propylene

Polymer-grade propylene is high-purity propene used as a primary feedstock in polypropylene production for packaging, automotive parts, and consumer goods. It is a separate chemically defined acyclic unsaturated hydrocarbon, qualifying under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene Feedstock for Acrylonitrile

Propylene feedstock for acrylonitrile is propene used in the ammoxidation process to produce acrylonitrile, which is used in acrylic fibers and ABS plastics. It is a separate chemically defined compound, meeting the requirements of tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene for Cumene Production

Propylene for cumene production is high-specification propene used in alkylation with benzene to produce cumene, a precursor for phenol and acetone. It is a pure acyclic unsaturated hydrocarbon, qualifying under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene for Isopropyl Alcohol

Propylene for isopropyl alcohol is propene used in the sulfuric acid absorption process to produce isopropyl alcohol, which is used as a solvent and in rubbing alcohol. It is a separate chemically defined unsaturated acyclic hydrocarbon, falling under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene for Propylene Glycol

Propylene for propylene glycol is propene feedstock used in hydrolysis to produce propylene oxide and then glycol for antifreeze and polyester resins. It is a pure acyclic unsaturated hydrocarbon, qualifying under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene Monomer for Polypropylene

Propylene monomer for polypropylene is ultra-high purity propene specifically for homopolymer and copolymer polypropylene production in gas-phase processes. It is a separate chemically defined acyclic unsaturated hydrocarbon, falling under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene Research Grade

Propylene research grade is lab-grade propene for R&D in organic synthesis, supplied in small cylinders. It is a separate chemically defined compound, qualifying under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Propylene with Transport Stabilizer

Propylene with transport stabilizer is propene with an added anti-caking agent necessary for preservation or transport, per chapter note 1(f). It remains classified under tariff item 2901.22.00 as propene (propylene) since the stabilizer is solely for safety or transport.

2901.22.00

Refinery-Grade Propylene

Refinery-grade propylene is propene extracted from refinery streams, typically 90-95% purity, used for chemical synthesis including propylene oxide and cumene production. It is classified under tariff item 2901.22.00 as propene (propylene), distinct from polymer-grade due to lower purity.

2901.22.00

Refrigerated Liquid Propylene

Refrigerated liquid propylene is liquefied propene at -48°C for overseas tanker import. It is a pure acyclic unsaturated hydrocarbon, qualifying under tariff item 2901.22.00 as propene (propylene).

2901.22.00

Stabilized Propylene Gas

Stabilized propylene gas is propene with an added polymerization inhibitor, per chapter note 1(f), for safe transport and storage in petrochemical supply chains. It remains classified under tariff item 2901.22.00 as propene (propylene) since the inhibitor is solely for preservation.

2901.23.00

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.

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.

2901.23.00

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).

2901.23.00

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.

2901.23.00

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.

2901.23.00

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).

2901.23.00

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.

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.

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.

2901.24.00

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.

2901.24.00

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.

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).

2901.24.00

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.

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.

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.

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.

2901.24.00

Industrial Isoprene from C5 Raffinate

Industrial isoprene extracted from C5 petroleum cracker streams, with 95-97% purity, is used as a monomer in polyisoprene rubber production. It qualifies as a separate chemically defined organic compound under Chapter 29 note 1(a), despite its raffinate origin. This tariff item covers buta-1,3-diene and isoprene as acyclic unsaturated hydrocarbons.

2901.24.00

Isoprene with p-Menthadiene Impurities

Commercial isoprene containing controlled p-menthadiene impurities from thermal dimerization is classified under this item as the principal compound. The impurities are incidental and do not alter the fundamental nature of the isoprene. This aligns with Chapter 29 note 1(a) which permits impurities in chemically defined compounds.

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.

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.

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.

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.

2901.24.00

Research-Grade Isoprene (98% purity)

Research-grade isoprene at 98% purity, packaged in 100g glass ampoules, is used for chemical synthesis research. It meets the definition of a separate chemically defined organic compound under Chapter 29 note 1(a). The high purity and controlled impurities ensure classification under this tariff item.

2901.24.00

Stabilized Isoprene for Synthetic Rubber

Polymerization-grade isoprene stabilized with TBHP (tert-butyl hydroperoxide) to prevent premature polymerization during storage and transport. The stabilizer is necessary for preservation and safety, as permitted by Chapter 29 note 1(f). This product is classified under 2901.24.00 as isoprene.

2901.24.00

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.

2901.24.00

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.

2901.29.00

1,5-Hexadiene Petroleum Grade

1,5-Hexadiene is a nonconjugated diene (C6H10) with two double bonds, derived from petroleum ethylene processes. It is an unsaturated acyclic hydrocarbon, falling under tariff item 2901.29.00 as 'Other' acyclic hydrocarbons. It is used as a crosslinking agent in polymer production.

2901.29.00

1-Decene

1-Decene is a C10 alpha-olefin produced via Ziegler process oligomerization from petroleum. As a separate, chemically defined unsaturated acyclic hydrocarbon, it is classified under tariff item 2901.29.00 as 'Other'. It is used in synthetic lubricants and as a comonomer in polymer production.

2901.29.00

1-Decene (C10 Linear α-Olefin)

1-Decene is a linear alpha-olefin (C10H20) derived from natural gas liquids or petroleum. It is an unsaturated acyclic hydrocarbon, classified under tariff item 2901.29.00 as 'Other'. It is used in producing polyalphaolefins (PAO) for synthetic lubricants.

2901.29.00

1-Dodecene

1-Dodecene (C12H24) is a long-chain linear alpha-olefin from petroleum oligomerization. It is a separate, chemically defined unsaturated acyclic hydrocarbon, classified under tariff item 2901.29.00 as 'Other'. It is used in synthetic lubricants, detergents, and as a polymer comonomer.

2901.29.00

1-Dodecene (C12 Linear α-Olefin)

1-Dodecene is a C12 linear alpha-olefin (C12H24) derived from petroleum. It is an unsaturated acyclic hydrocarbon, classified under tariff item 2901.29.00 as 'Other'. It is essential for manufacturing linear alkylbenzene (LAB) used in detergents.

2901.29.00

1-Hexadecene (C16 Linear α-Olefin)

1-Hexadecene is a C16 linear terminal olefin (C16H32) derived from petroleum. It is an unsaturated acyclic hydrocarbon, classified under tariff item 2901.29.00 as 'Other'. It is used in producing high-viscosity PAO base stocks.

2901.29.00

1-Hexene

1-Hexene is an acyclic unsaturated hydrocarbon (C6H12) with a terminal double bond, derived from petroleum cracking. It is a separate, chemically defined compound, classified under tariff item 2901.29.00 as 'Other'. It is used as a comonomer in polyethylene production and in specialty chemicals.

2901.29.00

1-Hexene (C6 Linear α-Olefin)

1-Hexene is a colorless liquid unsaturated acyclic hydrocarbon (C6H12) with a terminal double bond, derived from petroleum cracking. It is classified under tariff item 2901.29.00 as 'Other'. It is used as a comonomer in polyethylene production.

2901.29.00

1-Nonene

1-Nonene (C9H18) is a linear alpha-olefin with a terminal double bond, representing the C9 range of unsaturated acyclic hydrocarbons. It is classified under tariff item 2901.29.00 as 'Other' as it is not specifically enumerated. It is used in synthetic lubricants and as a chemical intermediate.

2901.29.00

1-Octene

1-Octene (C8H16) is a linear alpha-olefin produced via ethylene oligomerization from petroleum feedstocks. It is a separate, chemically defined unsaturated acyclic hydrocarbon, classified under tariff item 2901.29.00 as 'Other'. It is used as a comonomer in polyethylene and in synthetic lubricants.