an incorrectly mixed dietary supplement. Toxicology The US FDA and European Union currently classify sodium selenate as toxic, primarily if ingested or inhaled. Testing on rats showed a dose of 1.6mg/kg to be lethal. A low lethal dose as this places the chemical as being 2 to 3 times more toxic than sodium cyanide. As such, it is extremely toxic and must be handled with care. For a person, this dosage corresponds to 112mg, or, in terms of 200µg pills, 560 pills. Chronic exposure to sodium selenate can cause severe lung, kidney, and liver damage. Overexposure to selenium in the diet leads to a condition known as selenosis. Selenosis occurs at blood levels greater than 100µg/dL. Symptoms include gastrointestinal upsets, hair loss, white blotchy nails, garlic breath odour, fatigue, irritability, and mild nerve damage. References Selenates Sodium compounds