Only one substance will do the job: hydrofluoric acid ... and perfluorooctanoic acid (PFOA) is classified as a persistent organic pollutant or “forever chemical” with toxic properties.

Hydrofluoric acid (HF) and Hydrogen Fluoride (HF ... Hydrogen fluoride is an Extremely corrosive chemical. The vapor or liquid can cause severe corrosion of the skin, nose throat and eyes. Accidental ...

Note: First Aid must be started within seconds of HF contact in any form! Hydrogen fluoride and hydrofluoric acid cause severe, deeply penetrating burns to the skin, eyes and lungs. Although ...