# 2025-09134: The IRS May Put This Rubber on the Superfund Tax List

2025-09134, Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Ethylene Propylene Diene (EPDM) Rubber (x=5134, y=2250, z=98), is a Federal Register notice from Treasury Department, Internal Revenue Service published 2025-05-21, effective Written comments and requests for a public hearing must be received on or before July 21, 2025.; PRIA reads it as touching household money (as of 2026-10-22).

- Canonical: https://policyrisk.com/federal-register/2025-09134
- As of: 2026-10-22
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-09134
- Title: Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Ethylene Propylene Diene (EPDM) Rubber (x=5134, y=2250, z=98)
- Type: Notice
- Agencies: Treasury Department; Internal Revenue Service
- Citation: 90 FR 21825
- Published: 2025-05-21
- Effective: Written comments and requests for a public hearing must be received on or before July 21, 2025.
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-10-22

## In one line

The IRS May Put This Rubber on the Superfund Tax List

## Summary

The IRS got a request to add a type of rubber called EPDM to the list of chemicals that get a Superfund tax. This means companies making or using EPDM might pay extra taxes if the change happens. People have until July 21, 2025, to share their thoughts or ask for a public hearing before any decision is made.

## Abstract

This notice of filing announces that a petition has been filed requesting that ethylene propylene diene (EPDM) rubber ((C<INF>2</INF>H<INF>4</INF>)<INF>x</INF>(C<INF>3</INF>H<INF>6</INF>)<INF>y</INF> (C<INF>9</INF>H<INF>12</INF>)<INF>z</INF>; (x=5134, y=2250, z=98)) 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.

## Effects PRIA read

- Petition to Add EPDM Rubber to Superfund Tax List: cost, low. A petition filed May 1, 2025 requests that ethylene propylene diene (EPDM) rubber ((C2H4)x(C3H6)y(C9H12)z; x=5134, y=2250, z=98) be added to the list of taxable substances under Internal Revenue Code section 4672(a). The petitioner is Exxon Mobil Corporation and proposed classification numbers are…

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## Sources
- [2025-09134 on federalregister.gov](https://www.federalregister.gov/documents/2025/05/21/2025-09134/superfund-tax-on-chemical-substances-request-to-modify-list-of-taxable-substances-notice-of-filing)
- [2025-09134 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-05-21/pdf/2025-09134.pdf)

## Related
- [Previous: 2025-09133, Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substan…](https://policyrisk.com/federal-register/2025-09133)
- [Next: 2025-09135, Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substan…](https://policyrisk.com/federal-register/2025-09135)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-09134 (as of 2026-10-22).