Physical properties:
Density: 2.130 g/cm³
Melting point: 318.4ºC(591 K)
Boiling point: 1390 ºC(1663 K)
Vapor pressure: 24.5mmHg(25°C)
Saturated vapor pressure: 0.13 Kpa (739ºC)
Appearance: White crystalline powder
solubility: easily soluble in water, ethanol, glycerol, insoluble in acetone, ether
Chemical properties:
Sodium hydroxide has a corrosive effect on fibers, skin, glass, ceramics, etc., and will release heat when dissolved or diluted in concentrated solution; The neutralization reaction with inorganic acid can also produce a lot of heat and generate the corresponding salts. React with aluminum and zinc, non-metallic boron and silicon to release hydrogen; Disproportionation reaction occurs with halogens such as chlorine, bromine and iodine. Can precipitate metal ions from aqueous solution to become hydroxide; It can make the oil saponification reaction, generate the corresponding organic acid sodium salt and alcohol, which is the principle of removing the oil on the fabric.
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