Light magnesium oxide Molecular formula: MgO Quality Standard: HG/T2573-93 Properties: white powder, easily, odorless, tasteless, non-toxic, insoluble in water, soluble in acid and easy to absorb moisture. Indicators Index Name Indicators High grade First-class product Magnesium oxide (MgO) content% ≥ 95. 00 93. 00 Calcium oxide (Cao) content% ≤ 1. 00 1. 50 Hydrochloric acid insoluble% ≤ 0. 10 0. 15 Iron (Fe) content% ≤ 0. 05 0. 06 Sulfate (as So4 dollars) content% ≤ 0. 20 0. 30 Loss on ignition% ≤ 3. 50 5. 50 Chloride (CI) content% ≤ 0. 035 0. 070 Manganese (Mn) content% ≤ 0. 003 0. 003 Sieve residue (sieve 150mm) ≤ 0. 030 0. 050 Bulk density g / ml ≤ 0. 20 0. 20