Sodium hydroxide is a white translucent crystalline solid. The water solution has astringent taste and creamy feeling. Corrosive.
Solubility: easily soluble in water, dissolved when the release of a lot of heat. Soluble in ethanol, glycerol.
Deliquescence: easy to deliquescence in the air.
Water absorption: strong alkali moisture absorption, exposure to the air, the absorption of water molecules in the air, and finally will be completely dissolved into a solution, but the liquid sodium hydroxide is not hygroscopic.