Hydrofluoric acid (HF) and Hydrogen Fluoride (HF) are very poisonous, highly irritating and corrosive. Hydrofluoric acid or Hydrogen Fluoride (HF) is fatal if inhaled, if swallowed, or in contact with ...

Only one substance will do the job: hydrofluoric ... the reaction of sulfuric acid and calcium fluoride is strongly endothermic; the heat drives the reaction to completion. Raw hydrogen fluoride ...