Jorge Tornero asks about Gilson's fluid. The original Gilson's fluid was made up of Mercuric chloride 2 grams, glacial acetic acid 0.4ml, nitric acid 1.8 ml, 95% ethyl alcohol 10 ml, and distilled water 88ml. I don't know about usining zinc chloride in the formula Michael Titford USA Pathology Mobile AL USA