Appearance Colorless transparent liquid Assay 99%min Water Pass Unsaturated compound(as Br) 0.03% max Sulfuric acid test Pass Non-volatile matter 0.005% max

Appearance Red brown crystalline powder Assay 99%min Water insoluble 0.005% max Chloride 0.005% max Sulphate 0.005% max

PH 6.8(yellow)~8.4(red) Water solution testing Pass Residue on ignition (as sulfate) 17.0~21.0% Loss on drying 2.0% max

Appearance Dark brown liquid or dard brown solid Assay 99.0%min Residue on ignition(as sulphate) 0.2% max