*Appearance White small granular
*Main content 99.5% min
*MgSO4 48.59% min
*MgO 16.27% min
*Mg 9.81% min
*PH(5W/V%Sol) 5-8
*Ferron(Fe) 0.002% max
*Chloride(CL) 0.002%
*Heavy metal (Pb) 0.001 %max
*Arsenic(As) 0.0002% max
*Insoluble 0.01%max
*Size (mm) 0.1-1 0.2-3 1-4