Grain, methyl mercury-contaminated

The poisonings in Minamata were due to mercuric chloride in a river. It had been used as a catalyst in the production of vinyl chloride. The population was poisoned due to the contamination of fish. In Iraq, the mass poisoning was the result of contaminated bread, for which flour accidentially made of grains, which had been treated with methyl mercury, has been used. 

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