Re: [APD] RE: copper safe and fish medicines

["S. Hieber" <shieber at yahoo_com>]

Formaldehyde naturally, is a gas. The liquid some folks
think of as formaldehyde is a mixture of formaldehyde gas
in water water, commonly 37% solution. Formaldehyde
solution will polymerize so 10-15% methyl alchohol is added
to prevent polymerization. That combo, formaldehayde, water
and methyl alchohol is formalin.

A mixture with formalin added has a much smaller percentage
of formaldehyde in it. I think it works out that 10%
formalin solution is only 4% formaldehyde.

sh 
--- Pete <peteal at sympatico_ca> wrote:

> Talking about how certain medicines are hard on fish,
> some of these sound 
> down right nasty, maybe even to us.
> 
> http://www.fishdoc.co.uk/treatments/malachite.htm
> 
> All if it is a good read, but some of the scary stuff.
> 
> - Wear gloves and goggles when handling malachite green
> or formalin. Do not 
> inhale the fumes of formalin and always handle in a
> well-ventilated area. 
> Both are potentially dangerous. Malachite is a
> respiratory poison as well as 
> being a suspected carcinogen.
> 
> - It is likely that malachite green will be banned in the
> near future
> 
> - Formalin should be stored in the dark and above 40C to
> prevent the 
> formation of paraformaldehyde 
> 
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