Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Unwanted Combustion Enhancement by Potential Halon Replacements: Thermodynamic Considerations



Gregory T. Linteris


It is desirable to replace Halon 1301, CF3Br, as the fire suppressant used in cargo bay fire suppression. Unfortunately, some candidate agents for replacing Halon 1301, in particular C2HF5, C3H2F3Br, C6F12O, were found to create greater pressure rise in an Federal Aviation Administration (FAA) qualification test simulating an exploding aerosol can, and hence failed the test. The present work describes the thermodynamic behavior of C2HF5, C3H2F3Br, and Halon 1301 in the FAA aerosol can test when added at varying concentrations. The pressure rise in previously published FAA experiments are predicted, and the reasons for the overpressure are discussed.
Technical Note (NIST TN) - 1693
Report Number


Fire Suppression, Flame Inhibition, CF3Br, HFC-125, Halon Replacements, Cargo-Bay Fire Suppression


Linteris, G. (2011), Unwanted Combustion Enhancement by Potential Halon Replacements: Thermodynamic Considerations, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed June 20, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created March 1, 2011, Updated February 19, 2017