Hydrofluoric acid or Hydrogen Fluoride (HF) is fatal if inhaled, if swallowed, or in contact with skin. It causes severe skin burns and eye damage. The effects may be delayed after exposure. Do not ...

Although chemists consider hydrofluoric acid (HF ... causes soft tissue necrosis (similar to alkali damage) and bone damage by binding calcium. HF burns cause excruciating pain and are very slow to ...

Only one substance will do the job: hydrofluoric acid, or HFA. HFA has a bad reputation ... and if enough of it gets on your skin it’ll kill you slowly and leave you in agony the entire time.