Thanks for linking the MSDS that sinks your claim ...
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Ingestion: May cause irritation of the digestive tract. May cause kidney damage.
Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid if irritation or symptoms occur.
what if the “victim” is a child or pet that you don’t know that got into the stuff?