Potassium fluoride is a salt that is called potassium fluoride. White monoclinic crystal or crystalline powder. Taste salty. Easy to moisture absorption. Soluble in water, not soluble in ethanol. Its aqueous solution is alkaline and can corrode glass and porcelain. The relative density of 2.454. Melting point is 858 ℃. Medium toxicity, half of all deaths (rats, oral) 245mg/kg. Stimulating.
Soluble in water, soluble in hydrofluoric acid and liquid ammonia, soluble in alcohol and acetone. Aqueous solution is alkaline and can corrode glass and porcelain. When heated to sublimation temperature, it is only a little decomposed, but it is very active and can corrode the refractory. Hydrogen peroxide can be added to KF H2O2. There are two types of hydrate: KF, h2o, and KF. When less than 40.2 ℃, in aqueous solution can get dihydrate crystal (KF · 2 h2o), department of monoclinic crystal, 41 ℃ when the crystal soluble in water. Poisonous.
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