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EPA/OAR RIN: 2060-AT52 Publication ID: Spring 2019 
Title: Air Quality: Revision to Definition of Volatile Organic Compounds--Exclusion of cis-1,1,1,4,4,4-Hexafluorobut-2-ene (HFO-1336mzz-Z) 

This action revised EPA's definition of Volatile Organic Compounds (VOC). The action excludes hexafluorobut-2-ene (also known as HFO-1336mzz-Z) from the definition of VOC on the basis that this compound makes a negligible contribution to tropospheric ozone formation. The VOC exemption petition was submitted by E.I. DuPont de Nemours on February 4, 2014. This action reduces burden because it relieves the industry from characterizing and tracking certain information associated with this particular compound.

Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Deregulatory 
CFR Citation: 40 CFR 51   
Legal Authority: 42 U.S.C. 7602(s)   
Legal Deadline:  None
Action Date FR Cite
NPRM  05/01/2018  83 FR 19026   
NPRM Comment Period End  07/02/2018 
Final Rule  11/28/2018  83 FR 61127   
Final Rule Effective  01/28/2019 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
Sectors Affected: 326150 Urethane and Other Foam Product (except Polystyrene) Manufacturing 
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 Wayland
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-1045
Fax:919 541-5450