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# 1758-73-2Since 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