Magnesium Oxide Light 1. Superior grade: Magnesium Oxide(MgO) 95.0%mix    Insolunle in HCL solution 0.1max Calcium oxide (CaO) 1.0max    Sulphate (SO4) max0.2 Screening residues(through 150um mesh) 0.03max    Iron 0.05   Mangness 0.003max Chloride (Cl) 0.035max    Losses in ignition3.5min   Accumulation density(g/ml) 0.2max 2. First grade: Magnesium Oxide(MgO) 93.0min    Insolunle in HCL solution 0.2max Calcium oxide (CaO) 1.5max    Screening residues(through 150um mesh) 0.05max     Iron 0.06     Mangness 0.01max Chloride (Cl) 0.1max    Losses in ignition5.0 min   Accumulation density(g/ml) 0.2max 3. Second grade Magnesium Oxide(MgO) 92.0min    Calcium oxide (CaO) 2.0 max   Screening residues(through 150um mesh) 0.2 max   Iron 0.1 Chloride (Cl) 0.15max    Losses in ignition5.5min   Accumulation density(g/ml) 0.25max Package: 10KG /bag or 20KG /bag in woven bag lined with plastic-inner bag