Sodium hydroxide, the chemical formula of NaOH, commonly known as caustic soda, caustic soda, caustic soda, as a strong corrosive alkali, usually flaky or massive form, soluble in water (dissolved in water when the heat) and The formation of alkaline solution, and deliquescence, easy to absorb the air of water vapor (deliquescence) and carbon dioxide (metamorphism), can be added hydrochloric acid test is metamorphic.
NaOH chemical laboratory is one of the essential chemicals, is also one of the common chemicals. Pure product is colorless and transparent crystal. Density 2.130g / cm³. Melting at 318.4 ° C. The boiling point of 1390 ° C. Industrial products contain a small amount of sodium chloride and sodium carbonate, is a white opaque crystals. There are massive, flaky, granular and rod-like. The amount of 39.997.
Sodium hydroxide in water treatment can be used as alkaline cleaning agent, soluble in ethanol and glycerol; insoluble in propanol, ether. And chlorine, bromine, iodine and other halogen disproportionation reaction. And acid from the role in the formation of salt and water.