Appearance Red purple crystal powder Sensitivity test Pass Residue on ignition(as sulphate) 1.0% max

Appearance Light yellow crystalline powder Assay 99%min Water 0.5% max Heay metals 5ppm max

Appearance Free flowing white powder Assay (potertiometric cal on dry substance) Min 99% PKa at 20℃ 6.7-6.9 Res.Aftr Ign.% ≤0.3 Insolubles Matter % ≤0.005 Hevy metals（Pb） ≤5ppm

Appearance Yellow crystalline powder Assay, HPLC 99%min

Appearance Colorless Transparent Liquid Assay 99.50% min Color (Pt-Co) 15# max Water ≤0.05% Acidity (As Acid) ≤0.005% Refractive Index（25℃/D） 1.430～1.435 Relative Density (25/25℃) 1.154～1.164 Heay Metals (as Pb) ≤5 ppm Arsenic ≤1 ppm