G/TBT/N/USA/1856  
29 April 2022  
(22-3396) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  UNITED STATES OF AMERICA  
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:  Environmental Protection Agency (EPA) [1886]  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated i f different from above:   
Please submit comments to: USA WTO TBT Enquiry Point, Email: usatbtep@nist.gov  
3. Notified under Article 2.9.2 [X], 2.10.1 [  ], 5.6.2 [  ], 5.7.1 [  ], 3.2 [  ], 7.2 [  ], 
other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  Volatile 
Organic Compounds --Exclusion of (2E) -1,1,1,4,4,4 -hexafluorobut -2-ene (HFO -
1336mzz(E)); Environmental prot ection (ICS code(s): 13.020); Air quality (ICS code(s): 
13.040); Production in the chemical industry (ICS code(s): 71.020); Products of the 
chemical industry (ICS code(s): 71.100)  
5. Title, number of pages and language(s) of the notified document:  Air Qua lity: 
Revision to the Regulatory Definition of Volatile Organic Compounds --Exclusion of (2E) -
1,1,1,4,4,4 -hexafluorobut -2-ene (HFO -1336mzz(E)); (9 page(s), in English)  
6. Description of content:  Proposed rule - The U.S. Environmental Protection Agency 
(EPA) is proposing to revise the EPA's regulatory definition of volatile organic compounds 
(VOC) under the Clean Air Act (CAA). This action proposes to add (2E) -1,1,1,4,4,4 -
hexafluorobut -2-ene (also known as trans -1,1,1,4,4,4 -hexafluorobut -2-ene, and HFO -
1336m zz(E); CAS number 66711 -86-2) to the list of compounds excluded from the 
regulatory definition on the basis that this compound makes a negligible contribution to 
tropospheric ozone (O3) formation.  
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Protection of human health or safety; Protection of the environment  
8. Relevant documents:   
87 Federal Register (FR) 25170, 28 April 2022; Title 40 Code of Federal Regulations (CFR) 
Part 51:  
https://www.govinfo.gov/content/pkg/FR -2022-04-28/html/2022 -08922.htm  
https://www.govinfo.gov/content/pkg/FR -2022-04-28/pdf/2022 -08922.pdf  
  
This proposed rule is identified by Docket Number EPA -HQ-OAR-2021-0420. The Docket 
Folder is available  from Regulations.gov at https://www.regulations.gov/docket/EPA -HQ-
OAR-2021-0420/document  and provides access to primary documents as well as 
comments received. Documents are also accessible from Regulations.gov  by searching G/TBT/N/USA/1856  
 
- 2 - 
 
  the Docket Number. WTO Members and their stakeholders are asked to submit comments 
to the USA TBT Enquiry Point  by or before 4pm Eastern Time  on 27 June 2022. Comments 
received by the USA TBT Enquiry Point from WTO Members and their stakeholders will be 
shared with the regulator and will also be submitted to the Docket  on Regulations.gov if 
received within the comment period.  
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  27 June 2022  
11. Texts available from:  National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
https://members.wto.org/crnattachments/2022/TBT/USA/22_3125_00_e.pdf