AmmoniumThiocyanate NH4SCN(drying) 99%min PHValue 4.5-6 SolutionAppearance clearity Chloride(CL-) 0.015%max Sulfide(S) 0.001%max Sulfate(SO4), 0.01%max Iron(Fe) 0.0002%max HeavyMetal(Pb) 0.002%max Lossindrying 2.0%max SodiumHydrosufide Item YellowishFlake NaHS, 70%min Na2S, 3% max Iron（Fe） 0.003 %max SodiumThiocyanate Item Soild Liquid NaSCN 99%min 50%min PHValue 6-9 6-9 Chloride(CL-), 0.01%max 0.01%max Sulfate(SO4), 0.01%max 0.005%max Waterinsolubles 0.02%max 0.02%max Ammonium, 0.004%max 0.004%max HeavyMetal(Pb), 0.002%max 0.002%max Fe， 0.0001%max 0.0001%max Lossondrying, 2.0%max