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EPA/OAR RIN: 2060-AK26 Publication ID: Fall 2023 
Title: Protection of Stratospheric Ozone: Listing of Substitutes for Ozone-Depleting Substances: N-Propyl Bromide 

This rule would propose a determination as to whether n-propyl bromide (nPB) is an acceptable substitute for Class I and Class II ozone depleting substances used in a number of uses including cleaning aerosol and carrier solvent uses adhesives and coatings. EPA previously listed nPB as an acceptable solvent in metals, electronics, and precision cleaning (May 30, 2007; 72 FR 30142) and proposed to list nPB as unacceptable for the aerosol solvent and adhesives end-uses and acceptable subject to use conditions for the coatings end-use (May 30, 2007; 72 FR 30168). Since the issuance of those earlier rules, there is significant new information available concerning toxicity and industrial hygiene standards for this chemical, and EPA has issued or proposed additional requirements for this chemical under other EPA programs. If found acceptable, this would provide industry with another alternative to solvents with higher ozone depletion potential. An acceptability determination could include specific conditions on the use of nPB in these uses for the purpose of ensuring that nPB is used in a manner that is as safe and environmentally protective as other available substitutes., OSHA does not currently regulate nPB. If we determine that nPB cannot be used safely in a specific end use, as compared with other substitutes available for that end use, we would find it unacceptable.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 82   
Legal Authority: 42 U.S.C. 7414    42 U.S.C. 7601    42 U.S.C. 7671 to 7671q Clean Air Act   
Legal Deadline:  None
Action Date FR Cite
NPRM  06/03/2003  68 FR 33283   
NPRM  10/02/2003  68 FR 56809   
NPRM  05/30/2007  72 FR 30168   
Supplemental NPRM  11/00/2024 
Final Rule  12/00/2025 
Additional Information: Split from RIN 2060-AJ58
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:  
Sectors Affected: 238320 Painting and Wall Covering Contractors; 326150 Urethane and Other Foam Product (except Polystyrene) Manufacturing 
RIN Data Printed in the FR: No 
Agency Contact:
Margaret Sheppard
Environmental Protection Agency
Office of Air and Radiation
1200 Pennsylvania Avenue NW, Mail Code 6205T,
Washington, DC 20460
Phone:202 343-9163
Fax:202 343-2338

Chenise Farquharson
Environmental Protection Agency
Office of Air and Radiation
1200 Pennsylvania Avenue NW, Mail Code 7405M,
Washington, DC 20460
Phone:202 564-7768
Fax:202 564-4775