Product name: Caustic Soda/ Sodium Hydroxide Chemical formula: NaOH CAS number: 1310-73-2 Colour: White Appearance: White irregular flakes Melting point: 318.4 Boiling point: 1390 Solubility in water: 111g/100ml at 20 Density: 2.13g/cm3WELCOME TO BUY IT.