Re: sodium benzoate

From: maria ahlberg <mariaahlberg13@hotmail.com>
Subject: sodium benzoate
Date: Wed, 13 Apr 2005 07:40:42 +0000

> Is there anyone on the list who has tested sodium benzoate in the gum
> solution, to keep the gum from rutten?

Benzoate is a popular bactericide in acidic food products. Its
weakness is that its effects decrease as the pH increase, and also its
not very effective against molds/fungi. I think thymol or
2-phenylphenol are generally more effective and more widely used in
photography. Another popular bactericide in photography is
isothiazolone, which is typically a 3:1 mixture of
5-chloro-2-methyl-2H-isothiazol-3-one and
2-methyl-2H-isothiazol-3-one. There are a lot more effective
bactericides but these are generally preferred because of low human
toxicity and better biodegradability than many other agents.

--
Ryuji Suzuki
"Well, believing is all right, just don't let the wrong people know
what it's all about." (Bob Dylan, Need a Woman, 1982)