Caustic Soda is also known as Sodium Hydroxide (NaOH). It is a highly corrosive and reactive acid that readily reacts with metals like zinc, bronze, brass, copper, and others. As it reacts with skin and tissue, it is advisable to keep Caustic Soda away from leather, human skin, eyes, and other sensitive areas. We offer standard grade of Sodium Hydroxide with freezing point Approximately 58Â°F (14Â°C) and boiling point Approximately 293Â°F (145Â°C). Caustic Soda is available with us in tamper-proof packaging as when exposed to air, it changes color and react heavily.