Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Methyl Methacrylate-ethyl Methacrylate-methacrylic Acid Copolymer in a Styrene Solution (x=75.76, y=8.46, z=1, s=168.4)

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of the Treasury Internal Revenue Service AGENCY: Internal Revenue Service (IRS), Treasury. ACTION: Notice of filing and request for comments. SUMMARY: This notice of filing announces that a petition has been filed requesting that methyl methacrylate-ethyl methacrylate-methacrylic acid copolymer in a styrene solution ((C 5 H 8 O 2 ) x -(C 6 H 10 O 2 ) y -(C 4 H 6 O 2 ) z -(C 8 H 8 ) s ; x=75.76, y=8.46, z=1, s=168.4) 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 March 16, 2026. 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 https://www.regulations.gov (indicate public docket number IRS-2025-0599 or methyl methacrylate-ethyl methacrylate-methacrylic acid copolymer in a styrene solution ((C 5 H 8 O 2 ) x -(C 6 H 10 O 2 ) y -(C 4 H 6 O 2 ) z -(C 8 H 8 ) s ; x=75.76, y=8.46, z=1, s=168.4) 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 Comments cannot be edited or withdrawn once submitted to the Federal eRulemaking Portal.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 Methyl Methacrylate-ethyl Metha…