Appearance White powder Melting point 131~135℃ Water solubility Qualified Ignition residue 0.050% max Chloride 0.002% max Sulfate 0.01% max Gallic acid Complies Assay 99.5% min

Appearance White granular and powder Exchange capacity 1mmol/g， on dry base 0.9-1.1

Appearance Orange-yellow flaky crystal or crystalline powder PH 3.0(Orange)~4.4(yellow) Sensitivity Pass testing Solution in water Pass testing Residue on iginition(as Sulfate) 18.5%-22.0% Oxide Pass testing

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

Appearance straw yellow powder Assay 99%min Heay metals 5ppm max water content 0.5% max

Appearance White powder Assay (HPLC) 98.0% Min. Heay metals ≤5ppm water content ≤0.5%

Appearance white or light yellow crystal Assay,HPLC 99%min Melting point 168-171℃ Solubility Clear,colorless or light yellow solution Loss on drying 0.5% max Heay metals 5ppm max

Appearance Yellow to pale yellow powder Assay 98%min Heay metals 5ppm max Water content 0.5% max