Notice2025-08318
Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Di-isobutylene
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
May 13, 2025
Issuing agencies
Treasury DepartmentInternal Revenue Service
Abstract
This notice of filing announces that a petition has been filed requesting that di-isobutylene be added to the list of taxable substances. This notice of filing also requests comments on the petition. This notice of filing is not a determination that the list of taxable substances is modified.
Full Text
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<title>Federal Register, Volume 90 Issue 91 (Tuesday, May 13, 2025)</title>
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[Federal Register Volume 90, Number 91 (Tuesday, May 13, 2025)]
[Notices]
[Pages 20352-20353]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-08318]
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DEPARTMENT OF THE TREASURY
Internal Revenue Service
Superfund Tax on Chemical Substances; Request To Modify List of
Taxable Substances; Notice of Filing for Di-isobutylene
AGENCY: Internal Revenue Service (IRS), Treasury.
ACTION: Notice of filing and request for comments.
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SUMMARY: This notice of filing announces that a petition has been filed
requesting that di-isobutylene be added to the list of taxable
substances. This notice of filing also requests comments on the
petition. This notice of filing is not a determination that the list of
taxable substances is modified.
DATES: Written comments and requests for a public hearing must be
received on or before July 14, 2025.
ADDRESSES: Commenters are encouraged to submit public comments or
requests for a public hearing relating to this petition electronically
via the Federal eRulemaking Portal at <a href="https://www.regulations.gov">https://www.regulations.gov</a>
(indicate public docket number IRS-2025-0037 or Di-isobutylene) by
following the online instructions for submitting comments. Comments
cannot be edited or withdrawn once submitted to the Federal eRulemaking
Portal.
[[Page 20353]]
Alternatively, comments and requests for a public hearing may be mailed
to: Internal Revenue Service, Attn: CC:PA:01:PR (Notice of Filing for
Di-isobutylene), Room 5203, P.O. Box 7604, Ben Franklin Station,
Washington, DC 20044. All comments received are part of the public
record and subject to public disclosure. All comments received will be
posted without change to <a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any
personal information provided. You should submit only information that
you wish to make publicly available. If a public hearing is scheduled,
notice of the time and place for the hearing will be published in the
Federal Register.
FOR FURTHER INFORMATION CONTACT: Jacob W. Peeples at (202) 317-6855
(not a toll-free number).
SUPPLEMENTARY INFORMATION:
Request To Add Substance to the List
(a) Overview. A petition was filed pursuant to Rev. Proc. 2022-26
(2022-29 I.R.B. 90), as modified by Rev. Proc. 2023-20 (2023-15 I.R.B.
636), requesting that di-isobutylene be added to the list of taxable
substances under section 4672(a) of the Internal Revenue Code (List).
The petition requesting the addition of di-isobutylene to the List is
based on weight and contains the information detailed in paragraph (b)
of this document. The information is provided for public notice and
comment pursuant to section 9 of Rev. Proc. 2022-26. The publication of
petition information in this notice of filing is not a determination
and does not constitute Treasury Department or IRS confirmation of the
accuracy of the information published.
(b) Petition Content.
(1) Substance name: Di-isobutylene.
(2) Petitioner: TPC Group, Inc., an exporter of di-isobutylene.
(3) Proposed classification numbers:
(i) HTSUS number: 2901.29.1050.
(ii) Schedule B number: 2901.29.6000.
(iii) CAS number: 25167-70-8.
(4) Petition filing dates:
(i) Petition filing date for purposes of making a determination:
April 8, 2025.
(ii) Petition filing date for purposes of section 11.02 of Rev.
Proc. 2022-26, as modified by section 3 of Rev. Proc. 2023-20: November
12, 2024.
(5) Description from petition: According to the petition, di-
isobutylene (sometimes referred to as ``DIB'') is a mixture of
dimerized isobutylene isomers that is a liquid product with a gasoline
like consistency. It typically has a single unsaturated double bond per
dimer that can be used for further chemistry. Di-isobutylene is largely
derivatized for use as an antioxidant, adhesive resin, surfactant,
plasticizer, as an additive in polymer, rubber, and lubricant
formulations as well as in personal care products. When hydrogenated,
it becomes octane and used in fuel blending.
Di-isobutylene is made from isobutylene, which is an isomer of the
taxable chemical butylene. Taxable chemicals constitute 100.00 percent
by weight of the materials used to produce this substance.
(6) Process identified in petition as predominant method of
production of substance: The predominant method of production is the
cationic dimerization (polymerization) of isobutylene monomers. An acid
catalyst (typically a sulfonic acid resin) and polar moderator are used
to generate a stable cation on the tertiary carbon of isobutylene. This
cation induces a chain growth dimerization that incorporates
isobutylene monomer. The catalyst is not a component of the resulting
di-isobutylene.
(7) Stoichiometric material consumption equation, based on process
identified as predominant method of production:
2C<INF>4</INF>H<INF>8</INF> (Isobutylene) [rarr]
C<INF>8</INF>H<INF>16</INF> (Di-isobutylene)
(8) Tax rate calculated by Petitioner, based on Petitioner's
conversion factors for taxable chemicals used in production of
substance:
(i) Tax rate: $9.74 per ton.
(ii) Conversion factors: 1.00 butylene.
(9) Public docket number: IRS-2025-0037.
Michael Beker,
Senior Counsel (Energy, Credits, and Excise Tax), IRS Office of Chief
Counsel.
[FR Doc. 2025-08318 Filed 5-12-25; 8:45 am]
BILLING CODE 4830-01-P
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