Re: chemigrams (again?)/ cyanide

It looks like heat or acids like acetic acid in contact with thiocyanates
(potassium/ammonium/sodium thiocyanate) are likely to form cyanide.

Martin

----- Original Message -----
From: "Jonathan Bailey" <jon@jonathan-bailey.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Friday, September 24, 2004 3:48 PM
Subject: RE: chemigrams (again?)/ cyanide

> Martin,
>
> You stated:
> Thiocyanate is actually a fixing agent (silver halide solvent)...
> Regarding the acetate-buffered thiocyanate solution, it might be related
to
> the risk of releasing cyanide when thiocyanate is brought in contact with
> acids.
>
> I always understood that cyanide is "fixed" and stable in substances like
> sodium thiocyanate or pot. ferracyanide (and/or ferricyanide...) etc.
>
> Jon
> www.jonathan-bailey.com
>
>
Received on Sat Sep 25 04:27:22 2004