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LegalText 26 U.S.C. § 4672 Definitions and special rules us united_states_code code_section 26 INTERNAL REVENUE CODE 38 ENVIRONMENTAL TAXES 4672 26 U.S.C. § 4672 current 119-100 2026-06-26 official https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc26@119-100.zip /us/usc/t26/s4672 data/legal/raw/us/code/title-26/usc26.xml fafc90b4fce944b385f422d3e5d0019628609b5a403715dd2e7176384affebfa a261f094809116f42a96648a3d5eee80fa010379d67412551c21dd5c900b27f4 3e1f0a52c132726b201f3da9109339ce44f943e1c885ac47a4e4f00118c26aa6 2026-07-04 official
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26 U.S.C. § 4672 - Definitions and special rules

Text

(a) Taxable substance For purposes of this subchapter—

(1) In general The term “taxable substance” means any substance which, at the time of sale or use by the importer, is listed as a taxable substance by the Secretary for purposes of this subchapter.

(2) Determination of substances on list A substance shall be listed under paragraph (1) if—

(A) the substance is contained in the list under paragraph (3), or

(B) the Secretary determines, in consultation with the Administrator of the Environmental Protection Agency and the Commissioner of U.S. Customs and Border Protection, that taxable chemicals constitute more than 20 percent of the weight (or more than 20 percent of the value) of the materials used to produce such substance (determined on the basis of the predominant method of production).

If an importer or exporter of any substance requests that the Secretary determine whether such substance be listed as a taxable substance under paragraph (1) or be removed from such listing, the Secretary shall make such determination within 180 days after the date the request was filed.

(3) Initial list of taxable substances CumeneMethylene chloride StyrenePolypropylene Ammonium nitratePropylene glycol Nickel oxideFormaldehyde Isopropyl alcoholAcetone Ethylene glycolAcrylonitrile Vinyl chlorideMethanol Polyethylene resins, totalPropylene oxide PolybutadienePolypropylene resins Styrene-butadiene, latexEthylene oxide Styrene-butadiene, snpfEthylene dichloride Synthetic rubber, not containing fillersCyclohexane UreaIsophthalic acid FerronickelMaleic anhydride Ferrochromium nov 3 pctPhthalic anhydride Ferrochrome ov 3 pct. carbonEthyl methyl ketone Unwrought nickelChloroform Nickel waste and scrapCarbon tetrachloride Wrought nickel rods and wireChromic acid Nickel powdersHydrogen peroxide Phenolic resinsPolystyrene homo­polymer resins Polyvinylchloride resinsMelamine Polystyrene resins and copolymersAcrylic and methacrylic acid resins Ethyl alcohol for nonbeverage useVinyl resins EthylbenzeneVinyl resins, NSPF.

(4) Modifications to list The Secretary shall add to the list under paragraph (3) substances which meet either the weight or value tests of paragraph (2)(B) and may remove from such list only substances which meet neither of such tests.

(b) Other definitions For purposes of this subchapter—

(1) Importer The term “importer” means the person entering the taxable substance for consumption, use, or warehousing.

(2) Taxable chemicals; United States The terms “taxable chemical” and “United States” have the respective meanings given such terms by section 4662(a).

(c) Disposition of revenues from Puerto Rico and the Virgin Islands The provisions of subsections (a)(3) and (b)(3) of section 7652 shall not apply to any tax imposed by section 4671.

(Added Pub. L. 99499, title V, § 515(a), Oct. 17, 1986, 100 Stat. 1768; amended Pub. L. 100647, title II, § 2001(b), Nov. 10, 1988, 102 Stat. 3594; Pub. L. 114125, title VIII, § 802(d)(2), Feb. 24, 2016, 130 Stat. 210; Pub. L. 11758, div. H, title II, § 80201(c)(1), Nov. 15, 2021, 135 Stat. 1330.)

Notes

Editorial Notes

Amendments2021—Subsec. (a)(2)(B). Pub. L. 11758 substituted “20 percent” for “50 percent” in two places. 1988—Subsec. (a)(2). Pub. L. 100647, § 2001(b)(2), inserted at end “If an importer or exporter of any substance requests that the Secretary determine whether such substance be listed as a taxable substance under paragraph (1) or be removed from such listing, the Secretary shall make such determination within 180 days after the date the request was filed.” Subsec. (a)(2)(B). Pub. L. 100647, § 2001(b)(1), inserted “(or more than 50 percent of the value)” after “weight”. Subsec. (a)(4). Pub. L. 100647, § 2001(b)(3), amended par. (4) generally. Prior to amendment, par. (4) read as follows: “(A) In general.—The Secretary may add substances to or remove substances from the list under paragraph (3) (including items listed by reason of paragraph (2)) as necessary to carry out the purposes of this subchapter. “(B) Authority to add substances to list based on value.—The Secretary may, to the extent necessary to carry out the purposes of this subchapter, add any substance to the list under paragraph (3) if such substance would be described in paragraph (2)(B) if value were substituted for weight therein.”

Statutory Notes and Related Subsidiaries

Change of Name “Commissioner of U.S. Customs and Border Protection” substituted for “Commissioner of Customs” in subsec. (a)(2)(B) on authority of section 802(d)(2) of Pub. L. 114125, set out as a note under section 211 of Title 6, Domestic Security.

Effective Date of 2021 AmendmentAmendment by Pub. L. 11758 effective July 1, 2022, see section 80201(d) of Pub. L. 11758, set out as a note under section 4661 of this title.

Effective Date of 1988 AmendmentAmendment by Pub. L. 100647 effective, except as otherwise provided, as if included in the provision of the Superfund Revenue Act of 1986, Pub. L. 99499, title V, to which it relates, see section 2001(e) of Pub. L. 100647, set out as a note under section 56 of this title.

Effective DateSection effective Jan. 1, 1989, see section 515(c) of Pub. L. 99499, set out as a note under section 4671 of this title.

Transfer of Functions For transfer of functions, personnel, assets, and liabilities of the United States Customs Service of the Department of the Treasury, including functions of the Secretary of the Treasury relating thereto, to the Secretary of Homeland Security, and for treatment of related references, see sections 203(1), 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6. For establishment of U.S. Customs and Border Protection in the Department of Homeland Security, treated as if included in Pub. L. 107296 as of Nov. 25, 2002, see section 211 of Title 6, as amended generally by Pub. L. 114125, and section 802(b) of Pub. L. 114125, set out as a note under section 211 of Title 6.

Presumption As a Taxable Substance for Prior DeterminationsPub. L. 11758, div. H, title II, § 80201(c)(2), Nov. 15, 2021, 135 Stat. 1330, provided that: “Except as otherwise determined by the Secretary of the Treasury (or the Secretarys delegate), any substance which was determined to be a taxable substance by reason of section 4672(a)(2) of the Internal Revenue Code of 1986 prior to the date of enactment of this Act [Nov. 15, 2021] shall continue to be treated as a taxable substance for purposes of such section after such date.”

Publication of Initial ListPub. L. 11758, div. H, title II, § 80201(c)(3), Nov. 15, 2021, 135 Stat. 1330, provided that: “Not later than January 1, 2022, the Secretary of the Treasury (or the Secretarys delegate) shall publish an initial list of taxable substances under section 4672(a) of the Internal Revenue Code of 1986.”