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 a solution of hydrogen fluoride in water. HF is a highly corrosive acid, capable of dissolving many materials, especially oxides. Because of its high reactivity toward glass and moderate reactivity toward many metals, HF is usually stored in plastic containers (although polytetrafluoroethylene is slightly permeable to it).

Hydrofluoric acid attacks the silicon oxide in most types of glass. It also dissolves many metals (not nickel or its alloys, gold, platinum, or silver), and most plastics. Fluorocarbons such as Teflon (TFE and FEP), chlorosulfonated polyethylenene, natural rubber and neoprene all are resistant to HF. HF is so corrosive because the fluorine ion is highly reactive. Even so, it is not considered a 'strong' acid because it does not completely dissociate in water.

Process of hydrofluoric acid purification:

Crude HF-- HF a condenser - two - three condenser - crude HF reservoir - distillation column - distillation column condenser - Central degassing tower - degassing tower condenser - degassing overhead - distillation acid cooler - intermediate inspection finished reservoir tank --AHF