Formula: Na₂SO₄ CAS: 7757-82-6 EC No.: 231-820-9 M (Molar Mass): 142.04 g/mol

Assay (Gravimetric as BaSO₄): ≥ 99.5 % Appearance: White crystalline powder. pH (5% solution): 6.0 - 8.0 Loss on Drying (105°C): ≤ 0.2 % Insoluble Matter: ≤ 0.005 % Chloride (Cl): ≤ 0.0005 % Nitrate (NO₃): ≤ 0.001 % Phosphate (PO₄): ≤ 0.0005 % Ammonium (NH₄): ≤ 0.001 % Heavy Metals (as Pb): ≤ 0.0005 % Iron (Fe): ≤ 0.0005 % Calcium (Ca): ≤ 0.005 % Magnesium (Mg): ≤ 0.002 % Potassium (K): ≤ 0.01 %