Appearance: white crystal powderOdor: slight characteristic orderMelting point:132.0-135.0 degree CIdentification (A&B):PassesWater(Karl Fischer):0.5% maxHeavy metals(as Pb):10ppm maxArsentic(as As):2ppm maxChloride:0.014% maxSulfate:0.02% maxResidue on ignition0.02% maxAssay:99.0-101.0%Lead:2ppm maxAssay:99.0-101%Organic volatile impurities:meet requiredParticle size:80 mesh passed 100%