Just how safe is Multi-Etch compared to hydrofluoric or nitric acid? Well, while I would never recommend this, I have reached my hand into 100°+ F heated Multi-Etch to retrieve a part and I suffered no ill effects (all ten digits and skin intact). You would suffer significant damage if you tried that with hydrofluoric or nitric acids.
Download the Multi-Etch Material Safety Data Sheet (PDF) (Dry Powder).
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