CAS 1758-73-2 is for formamidine sulphinic acid wich is the other name for thiourea dioxide. You should read " I tried thiourea dioxyde and not sulfoxide "in my message. Sorry for that mistake
Daniel
Le 23/02/11 11:45, Ray Rogers a écrit :
Sources I looked at gave different yet presumably equvilant structures for those two cas #sThiourea is different. ??? Thiourea sulfoxide? Did you mean thiourea dioxide rather than sulfoxide? (Can you supply the CAS # for that?) Ray --- On *Wed, 2/23/11, daniel /<daniel.bouzard@xxxxxxxxxx>/* wrote: From: daniel <daniel.bouzard@xxxxxxxxxx> Subject: [pure-silver] Re: Thiourea and Thiourea dioxide To: pure-silver@xxxxxxxxxxxxx Date: Wednesday, February 23, 2011, 7:01 AM 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
