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EPA/OAR RIN: 2060-AV24 Publication ID: Spring 2022 
Title: Air Quality: Revision to Definition of Volatile Organic Compounds--Exclusion of Hexafluoro-2-Butene (HFO-1336mzz-E) 

This action proposes to revise EPA's definition of Volatile Organic Compounds (VOC) for purposes of preparing State Implementation Plans (SIPs) to attain the National Ambient Air Quality Standards (NAAQS) for ozone. The action would add Hexafluoro-2- Butene (also known as HFO-1336mzz-E) to the list of compounds excluded from the definition of VOC on the basis that this compound makes a negligible contribution to tropospheric ozone formation. The Chemours Company submitted a petition to the EPA on November 30, 2016, requesting that HFO-1336mzz-E be exempted from the regulatory definition of VOC. This compound is not a hazardous air pollutant and is not a stratospheric ozone depleting substance. It has low global warming potential compared to other compounds which it is substituting.

Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 63 subpart C   
Legal Authority: 42 U.S.C. 7414 et seq. Clean Air Act   
Legal Deadline:  None
Action Date FR Cite
NPRM  04/28/2022  87 FR 25170   
NPRM Comment Period End  06/27/2022 
Final Rule  11/00/2022 
Additional Information: .
Regulatory Flexibility Analysis Required: No  Government Levels Affected: State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Souad Benromdhane
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-07,
Research Triangle Park, NC 27711
Phone:919 541-4359

Robert J. Wayland
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-1045
Fax:919 541-5450