[pure-silver] Re: Thiourea and Thiourea dioxide
- From: daniel <daniel.bouzard@xxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 23 Feb 2011 08:01:38 +0100
Hello,
CAS 4189-44-0 and 1758-73-2 are both for thiourea dioxide under
different names. CAS 62-56-6 is for thiourea.
Several years ago I tried toning with thiourea sulfoxide following Tim
book and it worked very well.
Daniel Bouzard
Le 22/02/11 23:25, Eric Nelson a écrit :
I'm working from Tim Rudman's toning book and am playing with the FSA
toner.
In it he lists thiourea dioxide to be used in the toning bath. Now I
have thiourea that comes from TechChem down in Missouri and called
them to see what flavor of thiourea I have. Bob called back and he
found something odd in the CAS listings.
TechChem's thiourea is CAS# 62-56-6
Thiourea dioxide has TWO CAS #'s which he says is "unheard of".
CAS# 4189-44-0 and CAS# 1758-73-2
Since Tim has been known to hang around these parts and others here
may be more familiar with the CAS catalog system, I'm wondering if
these 3 compounds are interchangeable or what?
Thanks
Eric
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