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Date:         Thu, 9 Nov 2000 22:32:05 -0700
Reply-To:     Larry Hamm <ldhamm@XMISSION.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Hamm <ldhamm@XMISSION.COM>
Subject:      Re: Halon & extinguishers in general
Comments: To: Bill Davidson <wdavidson@THEGRID.NET>
Content-Type: text/plain; charset=us-ascii


Bill Davidson wrote:
>
> Halon is a brand name for the chemical Carbon Tetrachloride...
> The county water quality people nearly shut down my water well last year
> because we got just one reading of .6 (point six) parts per Billion
>
> The county gave me some printed information on Carbon Tetrachloride:


Bill,
I think your county is a bit confused. Halon 1211 is
bromochlorodifluoromethane, formula CF2CIBR. Halon 1301 (also known as
Freon 1301) is bromotrifluoromethane, formula CBrF3. 1000 ppm is the
OSHA PEL. Carbon tetraflouride is CF4, I believe, and is a nasty
character.
Larry
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