Appearance Yellow crystalline powder Assay 97%-103% Sulphated ash 0.1% max Loss on drying 0.5% max Acidity 4.5-7.0 Nitrofurfural diacetate 1.0% max

Appearance Colorless, clear liquid Boiling range 124.5-126.5℃ Density 0.702-0.705 Refractive index 1.3966-1.3986 Unsaturated hydrocarbons 0.03% max

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