Potassium fluoride,anhydrous
           Potassium fluoride,extra pure
           Potassium fluoride,Granular
           Silicon Dioxide
           Hydrofluoric acid
           Synthetic Cryolite
           Potassium Fluoaluminate
           Ammonium bifluoride
           Potassium Bifluoride
           Aluminium fluoride
           Sodium fluoride
           Potassium Fluorosilicate
           Fluorosilicic Acid
           Sodium silicofluoride
           Potassium Hydroxide Flakes
           Magnesium Fluoride
           Magnesium fluorosilicate
           Barium Fluoride
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Swedish pharmaceutical chemist Carl Scheele discovered hydrofluoric acid in 1771, when he investigated the composition of a mineral called fluorspar: Calcium fluoride. At a time when the element fluorine was unknown and all acids were thought to contain oxygen, Scheele noticed the glass-etching properties of the fumes that developed when heating fluorspar in sulfuric acid. Leading the fumes into water, he was the first to make large quantities of hydrofluoric acid. The exposure to HF – along with Scheele’s bad habit of tasting and smelling the substances he discovered – might have been one of the causes for his death at the age of just 43.

In the human body, hydrofluoric acid react with calcium and magnesium ions,so it will rely on more than two ions and play a role in the loss of function of the organ. Contact exposure to hydrofluoric acid may not start a pain, but symptoms may be until several hours later when the hydrofluoric acid and calcium in the bones reaction appear. 

If left untreated, could eventually lead to serious heart, liver, kidneys and nervous system or even fatal injury. People estimated intake of 1.5g hydrofluoric acid can cause immediate death. Inhalation of high concentrations of hydrofluoric acid mist, causing bronchitis, pulmonary edema and hemorrhage, hydrofluoric acid can also cause severe poisoning through skin absorption.