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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What are the hazards or symptoms of long-term inhalation of small amounts of hydrofluoric acid gas (hydrogen fluoride)? 

1, long-term inhalation will have upper respiratory tract irritation symptoms, or epistaxis, olfactory decline. Severe cases can occur bronchitis, pneumonia or pulmonary edema, and even the occurrence of reflex asphyxia. Anyway, as long as the feeling of throat is not comfortable to leave the environment, breathe some fresh air. 

2, mild symptoms of bleeding gums (morning brushing), dental plaque serious occurrence of bone disease (bone deformation), a fluoride occupational disease.

Fluoride hazards: the presence of hydrofluoric acid gas and dust in the workplace can be invaded by the respiratory tract and esophagus. Inhalation of higher concentrations of hydrogen fluoride can cause acute poisoning, eye and respiratory tract irritation, severe cases can occur bronchitis, pneumonia or pulmonary edema, and even the occurrence of reflex asphyxia. Into the body of fluoride 50% in the human bones, teeth deposition, long-term exposure can cause bone, tooth damage. Hydrogen fluoride is highly corrosive.