... :It also called copperas, copper vitriol, is a blue-green, monoclinic crystals; soluble in water, melts ... 64 C. It is commercially generated as a by-product during the manufacture of Titanium Dioxide ... eliminate moss, to reduce alkalinity, and as a trace element or micronutrient in fertilizer. Also can ... in wter purification as a substitute for aluminum sulfate, as a fertilizer, and as a feed additive. It ...