Color.................................Qualified Odor....................................Qualified Impurity..............................Qualified Appearance...........................White powder PH.......................................10.8 Moisture.................................10.3% Ash......................................2.33% Fineness....................................200 mesh 99.8% passed MgO content....................................1.41% Spots.......................................0.5/cm2 As.........................................0.21mg/kg Pb............................................0.62mg/kg Stability of hot paste..........................After 120 - 30min cooling, there is no hard lump that can not be crumbled in fingers. Qualitative experiment..............................10 of suspending liquid is changed to purple or blue during the reaction of iodine