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Potassium hydroxide (Chemical formula: KOH, Formula weight: 56.11) as a white powder or flake solid. Melting point360 ~ 406 ℃, Boiling point1320 ~ 1324 ℃, Relative Density2.044g / cm3, a flash point of 52 ° F, the refractive index n20 / D1.421, vapor pressure 1mmHg (719 ℃). With strong alkaline and corrosive. Easily absorb moisture in the air and deliquescence, absorb carbon dioxide from potassium carbonate. Was dissolved in about 0.6 parts water, 0.9 parts of cold water, 3 parts of ethanol, 2.5 parts of glycerin. Generate a lot of heat when dissolved in water, treated with an acid or alcohol when. pH 0.1mol / L solution was 13.5. Medium toxicity, median lethal dose (rat, oral) 1230mg / kg. Soluble in alcohol, ether-soluble. There is a strong alkaline and corrosive, caustic soda and a similar nature. Medium toxicity, median lethal dose (rat, oral) 1230mg / kg.
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