White crystal, uses ultra-wide range of

Chemical formula: NaOH
English pronunciation: qng yng huà nà
English name: Sodium Hydroxide
English another name: Sodium Hydrate, Caustic Soda, Lye (liquid)
Molecular Weight: 40.01
CASRN :1310-73-2
EINECS Registry Number :215-185-5
Density: 2.130 grams / cm 3
Melting point: 318.4
Water solubility: very soluble
Boiling Point: 1390
Base dissociation constant (Kb) = 3.0
Base dissociation constants of the countdown to the number (pKb) = -0.48
Lethal dose: 40mg/kg
Secondary identification of sodium hydroxide method: adding MgCl2, produces a white precipitate. Flame color reaction, the flame yellow.