Sodium Selenate --- Na2O4Se and Sodium Selenite --- Na2SeO3 are two different compounds, often confused by purchasers.
Appearance: White to off-white or grayish crystalline powder.
Assay: 98% to 100.5%
Loss on drying: 0.5% maximum
Selenium Content: 41 % minimum
Selenite Content: 1% maximum
Iron: 50 ppm maximum
Lead: 50 ppm maximum
Chloride (Cl): 100 ppm maximum
Sulfate (SO4): 100 ppm maximum.
