For those that are interested, Dale Grant has posted his chemical analysis of the Chinese Amidol on the MAS site;

http://michaelandpaula.com/mp/AzoFor...ID=10524&CID=5

Looks like contamination of Fe and Ni are responsible for the red wine color and I would say the high amount of Sn and possibly other contaminants would be responsible for the black sludge.

B. Dalton