Barium permanganate

A) There are insufficient data in the literature to accurately characterize the acute toxicity of barium salts. Ingestions on the order of 0.8 to 1 g have been reported as potentially lethal. With aggressive intensive care, adults have recovered from severe toxicity after ingesting as much as 30 grams of barium carbonate.

A) TOXICITY: The probable lethal dose in an adult is 10 grams. Significant gastrointestinal burns have been reported after ingestion of 3 grams by an adult. A man developed caustic gastric injury after ingesting 20 g of a household antiseptic, containing potassium permanganate dissolved in 300 mL of water. He recovered following supportive care. Ingestion of one teaspoon of potassium permanganate crystals has been fatal in a child.