Oxalic Acid - Toxicity and Safety

Toxicity and Safety

In humans, oxalic acid has an oral LDLo (lowest published lethal dose) of 600 mg/kg.

The toxicity of oxalic acid is due to kidney failure, which arises because it causes precipitation of solid calcium oxalate, the main component of kidney stones. Oxalic acid can also cause joint pain due to the formation of similar precipitates in the joints.

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