Sodium hydroxide, the chemical formula is NaOH, commonly known as caustic soda, caustic soda, caustic soda, is a strong caustic alkali, generally flake or granular form, easily soluble in water (dissolved in water when the heat is released) and form an alkaline solution, and delixing, easy to absorb water vapor in the air (delixing) and carbon dioxide (metamorphism).
NaOH is one of the essential chemicals in the chemistry laboratory and is also one of the common chemicals. Pure products are colorless transparent crystals. Density 2.130g/cm3. Melting point 318.4℃. Boiling point 1390℃. Industrial products contain small amounts of sodium chloride and sodium carbonate, which are white opaque crystals. There are blocky, flake, granular and rod-like. Formula 40.01 Sodium hydroxide can be used as an alkaline cleaning agent in water treatment, soluble in ethanol and glycerol, insoluble in propyl alcohol and ether. It also corrodes sodium carbon at high temperatures. It disproportionates with halogens such as chlorine, bromine and iodine, and neutralizes with acids to form salt and water.
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