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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Hydrofluoric acid (HF) is an inorganic acid commonly used in many domestic and industrial settings. HF was first used for etching glass due to its corrosive properties, but currently is also widely used in cleaning agents, rust removers, in the semiconductor industry, and for manufacturing fertilizer, pesticides and some plastics.

Technically, Hydrofluoric acid (HF) is a weak acid when compared with other hydrogen halide acids, meaning the molecule does not strongly dissociate into hydrogen and fluorine ions when dissolved in water. In fact, after being dissolved in water, HF becomes much less dangerous and less acidic at low concentration (≤20%) (1,2). However, at high concentrations (>20%), small quantities of HF can cause life-threatening burns, and if the diagnosis is missed or the treatment delayed, the consequences may be devastating for the patient. The present narrative review aims to inform the reader on current management standards for these unique chemical burns.

Clinical data: one day three young men  in a closed room 20m2 with hydrofluoric acid (concentration unknown) solution to clean utensils, for about 20 ~ 60 min followed by gradually increased cough, after 15 h they were emergency admission, chest tightness, cyanosis, cough a lot of pale yellow sputum, lungs could be heard and moist rales, X-ray results suggest they caught aspiration pneumonia. Nowadays, hydrofluoric acid (HF) is widely used,and it is an inorganic acid commonly used in many domestic and industrial settings, but the danger can not be ignored.