Specification Hg2789-1996 Fcc-iv Appearance White crystalline powder, free-flowing, nothing stimulating odor Content¿as ca 34.0-40.0 34.0-40.0 Arsenic ín0.0003 ín0.0003 Fluorine ín0.0003 ín0.0075 Heavy metals(as pb) ín0.002 ín0.0015 Lead í¬ ín0.0005 Weight loss on heating(200íµ) ín10.0 í¬ Weight loss on ignition¿800íµ í¬ ín10.0 Clarity ¿slightly turbid.