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EPA/OCSPP RIN: 2070-AL16 Publication ID: Spring 2025 
Title: N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) and its transformation product, 6PPD-quinone; Regulatory Investigation under the Toxic Substances Control Act (TSCA) 
Abstract:

In granting a petition filed under the Toxic Substances Control Act (TSCA) by Earthjustice on behalf of the Yurok Tribe, the Port Gamble S’Klallam Tribe, and the Puyallup Tribe of Indians, the Environmental Protection Agency (EPA or Agency) committed to pursuing an action to solicit and collect information from the public on the potential risks associated with N-(1,3-Dimethylbutyl)-N-phenyl-p-phenylenediamine (6PPD) (CASRN 793-24-8, DTXSID 9025114) and its transformation product, 6PPD-quinone (CASRN 2754428-18-5, DTXSID 301034849). On November 19, 2024, EPA issued an advance notice of proposed rulemaking (ANPRM) under section 6 of TSCA to gather information on the potential risks associated with 6PPD and 6PPD-quinone, along with information about potential alternatives and regulatory options to help inform a potential future regulatory action under TSCA. Public comments on the ANPRM were received through March 24, 2025. EPA is reviewing comments received on the ANPRM and is considering next steps.

 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Long-Term Actions 
Major: Undetermined  Unfunded Mandates: Undetermined 
EO 14192 Designation: Other 
CFR Citation: 40 CFR 751   
Legal Authority: 15 U.S.C. 2605 Toxic Substances Control Act    15 U.S.C. 2620 Toxic Substances Control Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
ANPRM  11/19/2024  89 FR 91299   
NPRM  To Be Determined 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Information URL: https://www.epa.gov/assessing-and-managing-chemicals-under-tsca  
Sectors Affected: 324 Petroleum and Coal Products Manufacturing; 325 Chemical Manufacturing 
RIN Data Printed in the FR: No 
Agency Contact:
Wyn Zenni
Environmental Protection Agency
Office of Chemical Safety and Pollution Prevention
1200 Pennsylvania Avenue NW,
Washington, DC 22630
Phone:202 564-6294
Email: zenni.wyn@epa.gov

Robert Landolfi
Environmental Protection Agency
Office of Chemical Safety and Pollution Prevention
1200 Pennsylvania Ave NW,
Washington, DC 20460
Phone:202 343-9161
Email: landolfi.robert@epa.gov