Appearance: White to off-white solidPurity:≥97%Solubility:Clear solution (1g in 5mL water)Residue On Ignition:≤0.1%Gravimetric Assay:59.6-62.8% Se (after reduction with sulfite)Melting Point: 70°C (dec.)(lit.)Density: 3.004g/mL at 25°C(lit.)Storage Temp: Store at 4°C