[Federal Register Volume 89, Number 170 (Tuesday, September 3, 2024)]
[Notices]
[Page 71791]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-19606]



[[Page 71791]]

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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 Propylene Glycol n-Propyl 
Ether

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 propylene glycol n-propyl ether 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 November 4, 2024.

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 http://www.regulations.gov 
(indicate public docket number IRS-2024-0043 or propylene glycol n-
propyl ether) by following the online instructions for submitting 
comments. Comments cannot be edited or withdrawn once submitted to the 
Federal eRulemaking Portal. Alternatively, comments and requests for a 
public hearing may be mailed to: Internal Revenue Service, Attn: 
CC:PA:01:PR (Notice of Filing for Propylene Glycol n-Propyl Ether), 
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 www.regulations.gov, 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: Camille Edwards Bennehoff 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 propylene glycol n-propyl ether be added to the 
list of taxable substances under section 4672(a) of the Internal 
Revenue Code (List). The petition requesting the addition of propylene 
glycol n-propyl ether 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: Propylene glycol n-propyl ether.
    (2) Petitioner: The Dow Chemical Company, an importer and exporter 
of propylene glycol n-propyl ether.
    (3) Proposed classification numbers:
    (i) HTSUS number: 2909.49.60.00.
    (ii) Schedule B number: 2909.49.0000.
    (iii) CAS number: 1569-01-3.
    (4) Petition filing dates:
    (i) Petition filing date for purposes of making a determination: 
June 13, 2024.
    (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: July 1, 
2022.
    (5) Description from petition: According to the petition, propylene 
glycol n-propyl ether is a propylene glycol and propanol based ether-
alcohol solvent. Propylene glycol n-propyl ether, a liquid, is used in 
a variety of applications including coatings and cleaning.
    Propylene glycol n-propyl ether is made from propylene, chlorine, 
sodium hydroxide, ethylene, and methane. 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: Glycol ethers are predominantly produced by 
reacting an epoxide (typically ethylene oxide or propylene oxide) with 
an alcohol; this reaction process is referred to as alkoxylation. 
Propylene glycol n-propyl ether is produced via the alkoxylation 
process (also known as ring opening of an epoxide) using n-propylene 
and propylene oxide. Propylene oxide is made by hydrochlorination 
(chlorine, propylene, NaOH). The n-propanol is manufactured by 
catalytic hydrogenation of propionaldehyde (hydrogen (H2) + 
propionaldehyde (CH3CH2CHO)). Propionaldehyde is 
produced by hydroformulation of ethylene (C2H4) 
using carbon monoxide (CO). The n-propanol is made by hydrogenating 
propionaldehyde in the presence of a catalyst.
    Additional information on the production process:
     The propylene glycol n-propyl ether alkoxylation reaction 
(n-propanol + propylene oxide) is base catalyzed, using a small amount 
of metal hydroxide to produce methoxide. Once propoxide is made, it is 
regenerated following conversion to the product in the presence of 
propylene oxide. Regenerated propoxide in the presence of propylene 
oxide will perpetually react until all propylene oxide is consumed or 
the reaction is halted through the use of controls.
     Since the amount of metal hydroxide used to produce 
propylene glycol n-propyl ether is very small, the metal hydroxide has 
been excluded from the stoichiometric material consumption equation; 
including the metal hydroxide would lead to a distorted conversion 
factor.
    (7) Stoichiometric material consumption equation, based on process 
identified as predominant method of production:

C3H6 (propylene) + Cl2 (chlorine) + 2 
NaOH (sodium hydroxide) + C2H4 (ethylene) + 
CH4 (methane) [rarr] 2 NaCl (sodium chloride) + 
H2 (hydrogen) + C6H14O2 
(propylene glycol n-propyl ether)

    (8) Tax rate calculated by Petitioner, based on Petitioner's 
conversion factors for taxable chemicals used in production of 
substance:
    (i) Tax rate: $10.43 per ton.
    (ii) Conversion factors: 0.36 for propylene, 0.60 for chlorine, 
0.68 for sodium hydroxide, 0.24 for ethylene, and 0.14 for methane.
    (9) Public docket number: IRS-2024-0043.

Michael Beker,
Senior Counsel (Passthroughs and Special Industries), IRS Office of 
Chief Counsel.
[FR Doc. 2024-19606 Filed 8-30-24; 8:45 am]
BILLING CODE 4830-01-P