Chapter 2901 — Customs Tariff Headings

2,2,4-Trimethylpentane (Isooctane)

Isooctane, or 2,2,4-trimethylpentane, is a highly branched saturated acyclic C8 hydrocarbon used as a gasoline octane booster and reference fuel. It falls under tariff item 2901.10.00 as a saturated acyclic hydrocarbon.

2,2-Dimethylbutane (Petroleum Derived)

2,2-Dimethylbutane (neohexane), a highly branched C6 saturated acyclic hydrocarbon from petroleum cracking. It is classifiable under tariff item 2901.10.00 as a saturated acyclic hydrocarbon, used in specialty solvents and fuel additives.

Butane Reference Fuel RM-1

Butane Reference Fuel RM-1 is a certified reference blend of iso-butane and n-butane used for automotive engine testing. As a saturated acyclic hydrocarbon mixture, it falls under tariff item 2901.10.00, which covers saturated acyclic hydrocarbons. The product is supplied in pressure cylinders with NIST traceability, ensuring high purity and reliability for testing applications.

Commercial n-Heptane (C7H16)

n-Heptane is a straight-chain saturated acyclic hydrocarbon used as a standard reference fuel and solvent in chromatography and coatings. It qualifies for tariff item 2901.10.00 as a chemically defined C7 saturated acyclic hydrocarbon.

Cyclohexane (Petroleum Derived)

Cyclohexane is a saturated cyclic hydrocarbon derived from benzene hydrogenation using petroleum-based feedstocks. Although cyclic, it is classifiable under tariff item 2901.10.00 as a saturated hydrocarbon, per the chapter's scope.

Ethane Calibration Standard 10 ppm

Ethane Calibration Standard is a gas mixture containing 10 ppm ethane in nitrogen, used for gas chromatography calibration. While the principal component is ethane, a saturated acyclic hydrocarbon, the presence of nitrogen as a balance gas may affect classification. Under Chapter 29, only products dissolved in water or specific solvents are covered, so this mixture may not qualify as a pure chemical compound.

Ethane-Deuterated Isotope Standard

Ethane-Deuterated Isotope Standard is fully deuterated ethane (C2D6) used for NMR spectroscopy and mass spectrometry. As a chemically defined isotopically substituted compound, it is a saturated acyclic hydrocarbon. It falls under tariff item 2901.10.00, which covers saturated acyclic hydrocarbons, including isotopically labeled variants.

Heptane (Shale Oil Derived)

n-Heptane, a C7H16 saturated acyclic hydrocarbon, extracted from shale oil retorting processes. It meets the criteria for tariff item 2901.10.00 as a saturated acyclic hydrocarbon, serving as a reference fuel and solvent.

Iso-Butane Aerosol Propellant Grade

Iso-Butane Aerosol Propellant Grade is isobutane (2-methylpropane) with purity greater than 99.5%, used as a propellant in aerosol products. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is supplied in bulk pressure containers for industrial use.

Isohexane Solvent Grade

Isohexane, a branched saturated acyclic C6 hydrocarbon, serves as a low-boiling solvent in rubber production, adhesives, and vegetable oil extraction. It is classifiable under tariff item 2901.10.00 as a saturated acyclic hydrocarbon.

Isopentane 99% Purity

Isopentane 99% Purity is a branched saturated acyclic hydrocarbon (2-methylbutane) used as a blowing agent in polystyrene foam production. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is a chemically defined isomer with high purity.

Isopentane Blowing Agent

Isopentane Blowing Agent is technical-grade isopentane used as a physical blowing agent for expandable polystyrene (EPS) foam insulation. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is a pure hydrocarbon with industrial applications.

Isopentane Low Boiling Fraction

Isopentane Low Boiling Fraction is a distilled isopentane fraction with a boiling point around 28°C, used for precision applications in organic synthesis. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product has high assay purity to minimize side reactions.

Isopentane (Natural Gas Derived)

Isopentane, a branched saturated acyclic hydrocarbon (2-methylbutane), is extracted from natural gas liquids via fractionation. It is classifiable under tariff item 2901.10.00 due to its status as a C5 saturated acyclic hydrocarbon.

Isopentane Polymerization Diluent

Isopentane Polymerization Diluent is isopentane used as a diluent in slurry-phase polymerization of polyolefins like polyethylene. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product provides low viscosity and easy recovery in reaction processes.

Isopentane Refrigerant Blend Base

Isopentane Refrigerant Blend Base is high-purity isopentane used as a component in hydrocarbon refrigerant blends for low-GWP cooling systems. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product meets REACH purity standards for refrigerant applications.

Liquid Ethane for Petrochemical Feed

Liquid Ethane for Petrochemical Feed is refrigerated liquid ethane (C2H6) used as feedstock for ethylene production. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is transported in ISO tank containers and meets high purity standards for petrochemical applications.

Medical Grade Ethane for MRI

Medical Grade Ethane for MRI is ultra-pure ethane gas used for cryogenic cooling in MRI magnet systems. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product meets medical and industrial gas specifications for high purity and safety.

N-Butane Laboratory Solvent

N-Butane Laboratory Solvent is n-butane gas with 99.9% purity, used as an extraction solvent in analytical chemistry. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is supplied in lecture bottle cylinders for laboratory use.

n-Hexane (99% purity)

n-Hexane (99% purity) is a saturated acyclic hydrocarbon with the chemical formula C6H14, used primarily as an industrial solvent in applications such as adhesive manufacturing and extraction processes. As a separate chemically defined organic compound, it falls under tariff item 2901.10.00, which covers saturated acyclic hydrocarbons.

n-Hexane (Petroleum Refined)

n-Hexane (C6H14) is a straight-chain saturated acyclic hydrocarbon isolated from petroleum naphtha via distillation and molecular sieve purification. It qualifies for tariff item 2901.10.00 as a petroleum-derived saturated hydrocarbon.

n-Pentane ACS Reagent Grade

High-purity n-pentane (normal pentane, C5H12) meeting American Chemical Society standards for laboratory use in chromatography and extractions. It is a separate chemically defined saturated acyclic hydrocarbon, classifiable under tariff item 2901.10.00.

n-Pentane Calibration Standard

Certified reference n-pentane at 1000 ppm in solvent for gas chromatography calibration of hydrocarbon analyzers. The pure base compound is diluted in a solvent, which per Chapter 29 note 1(d) allows classification as a solution of a chemically defined product.

n-Pentane Extraction Solvent

Industrial n-pentane used for natural product extractions like essential oils and cannabinoids in food/pharma processing. It is a pure acyclic saturated hydrocarbon, classifiable under tariff item 2901.10.00 per chapter purity notes.

n-Pentane HPLC Grade

Ultra-pure n-pentane optimized for high-performance liquid chromatography (HPLC) as a non-polar mobile phase solvent. This saturated acyclic hydrocarbon is classifiable under tariff item 2901.10.00 per chapter notes on chemically defined compounds.

n-Pentane (Petroleum Derived)

n-Pentane is a saturated acyclic hydrocarbon (C5H12) derived from petroleum refining processes such as straight-run distillation. It falls under tariff item 2901.10.00 as a saturated acyclic hydrocarbon.

n-Pentane Spectroscopic Grade

Spectro-grade n-pentane with minimal UV absorbance for use in spectrophotometry and NMR spectroscopy. This chemically defined acyclic saturated hydrocarbon is classifiable under tariff item 2901.10.00, ensuring transparent spectral performance.

Octane Research Grade (Petroleum)

High-purity n-octane (C8H18) derived from petroleum for use as gasoline octane reference standard. It falls under tariff item 2901.10.00 as a saturated acyclic hydrocarbon from petroleum sources, essential for fuel testing laboratories.

Pentane (n-Pentane 95%)

Pentane (n-Pentane 95%) is a volatile saturated acyclic hydrocarbon with the chemical formula C5H12, used in foam production as a blowing agent and as a solvent. It is classified under tariff item 2901.10.00 as a saturated acyclic hydrocarbon, provided it meets the criteria for a separate chemically defined compound with minimal impurities.

Polymerization Grade Butane

Polymerization Grade Butane is a high-purity blend of n-butane and iso-butane used for butene production and polybutene polymerization. As a saturated acyclic hydrocarbon mixture, it falls under tariff item 2901.10.00. The product is supplied in bulk for chemical synthesis applications.

Research Grade Ethane Gas

Research Grade Ethane Gas is high-purity ethane (C2H6) supplied in compressed cylinders for laboratory research and chemical synthesis. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product meets stringent purity requirements for research applications.

Ultra-High Purity Butane (99.999%)

Ultra-High Purity Butane (99.999%) is n-butane (C4H10) used for semiconductor manufacturing and calibration gas standards. As a saturated acyclic hydrocarbon, it falls under tariff item 2901.10.00. The product is supplied in specialty gas cylinders with exceptional purity.

Cryogenic Liquid Ethylene

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.

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.

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.

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.

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.

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.

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.

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.

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.

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).

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).

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).

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).

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).

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).

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).

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).

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).

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).

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).

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.

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.

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).

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.

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.

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).