[pure-silver] Re: Source of Dimezone-S/ antifreeze
- From: "John Black" <jblack@xxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 24 Sep 2004 11:58:58 -0400
>
> Wouldn't it be nicer to find some nonvolatile, weakly polar solvent
> that is practically water miscible? Preferably ones that make easily
> reversible esters with developing agents.
Yes, it would. I have tried Gainer's aproach using TEA, ethylene and propylene
glycols as a solvent and they work fine but require more heat for
solubilization of the phenidone and acorbic acid than I think is healthy. The
methanol can be heated by imersion in ordinary bath water or hot water from the
tap (about 100F/38C) and both chemicals disolve readily. The ascorbic acid
takes a little stiring to disolve 10gm in 120ml but it will stay in solution
when cooled to room temp.
I can live with the modest flamability of methanol and acceptable vapor
pressure (evaporation rate). It also doesn't draw water from the air as bad as
other alcohols (hygroscopic). Mainly I used it because it was readily available
to me in my vocation.
There could certianly be other, better solvents.
JB
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