1. Education
You can opt-out at any time. Please refer to our privacy policy for contact information.

Discuss in my forum

Halon Definition


This is the chemical structure of bromomethane.

This is the chemical structure of the halon bromomethane BrCH3. Bromomethane is halon 1001.


Definition: A halon is an organic compound containing one or two carbon atoms and halogen atoms.

Halons are numbered by a numbering scheme that follows the pattern:

Halon abcde

a is the number of carbon atoms
b is the number of fluorine atoms
c is the number of chlorine atoms
d is the number of bromine atoms.

e is the number of iodine atoms.

Halon numbers with less than five digits are assumed to have values of zero at the end of the number.

For example, halon 1011 is bromochloromethane (CH2BrCl): 1 carbon, 0 fluorine, 1 chlorine and 1 bromine atom.

©2014 About.com. All rights reserved.