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EPA/OCSPP RIN: 2070-AK88 Publication ID: Spring 2025 
Title: 1,4-Dioxane; Regulation Under the Toxic Substances Control Act (TSCA) 
Abstract:

This rulemaking will address the unreasonable risk of injury to health from 1,4-dioxane. Section 6(a) of the Toxic Substances Control Act (TSCA) requires that EPA, when it determines in a TSCA risk evaluation that a chemical substance presents unreasonable risk of injury to health or the environment, apply one or more requirements under TSCA section 6(a) by rule to the extent necessary so the chemical substance no longer presents unreasonable risk. EPA's final risk evaluation for 1,4-dioxane, describing 1,4-dioxane’s conditions of use and presenting EPA's determination of unreasonable risk, is in docket EPA-HQ-OPPT-2019-0238, with additional information in dockets EPA-HQ-OPPT-2016-0723 and EPA-HQ-OPPT-2022-0905.

 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Long-Term Actions 
Major: Undetermined  Unfunded Mandates: Undetermined 
EO 14192 Designation: Regulatory 
CFR Citation: 40 CFR 751   
Legal Authority: 15 U.S.C. 2605 Toxic Substances Control Act   
Legal Deadline:
Action Source Description Date
NPRM  Statutory  Statutory: TSCA section 6(c)  01/07/2022 
Final  Statutory  Statutory: TSCA section 6(c).  01/06/2023 
Timetable:
Action Date FR Cite
NPRM  09/00/2026 
Additional Information: .
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Small Entities Affected: Businesses  Federalism: Undetermined 
Included in the Regulatory Plan: Yes 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL: https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-management-14-dioxane  
Sectors Affected: 325 Chemical Manufacturing 
RIN Data Printed in the FR: No 
Agency Contact:
Cindy Wheeler
Environmental Protection Agency
Office of Chemical Safety and Pollution Prevention
1200 Pennsylvania Avenue NW, Mail Code 7404M,
Washington, DC 20460
Phone:202 566-0484
Email: wheeler.cindy@epa.gov

Joel Wolf
Environmental Protection Agency
Office of Chemical Safety and Pollution Prevention
1200 Pennsylvania Avenue NW, Mail Code 7404M,
Washington, DC 20460
Phone:202 564-0432
Email: wolf.joel@epa.gov