What is the difference between food grade lye and red devil lye

Answer (1 of 2): “Red Devil Lye” was a brand of lye that was commonly sold in grocery and hardware stores and often used as a drain opener. “Red Devil Lye” no longer exist and hasn’t existed in years, possibly over a decade. I’m really not sure if it was food safe or not, I suspect it was but tha

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What is the difference between food grade lye and red devil lye

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