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Commonly known as: caustic soda, Huo Jian, caustic soda. Chemical formula: NaOH English another name: Caustic Soda, Lye (liquid) Molecular Weight: 40.01 CAS No.: 1310-73-2 EINECS No.: 5-185-5 Density: .130 g/cm3 Melting point: 18.4 degrees Boiling Point: 390 degrees Content: 6.0%,≥98.0%,≥99.0% Physicochemical properties:nder the normal temperature is one kind of white crystal, has the strong corrosiveness. Easy to dissolve in the water,the solution was strongly alkaline,Can cause phenolphthalein redden.Strong corrosive, water absorption, can be used as desiccant.But, can't dry so2, carbon dioxide and Hydrogen chloride acidic gas etc.And easy to deliquescence in the air; soluble in water, and release a lot of heat.The sodium hydroxide also easy to dissolve in the ethyl alcohol, the glycerine; But does not dissolve in the ether, the acetone, the liquid ammonia. Uses: ainly used in chemical manufacturing, textile, bleach, rubber, leather, ceramics, soap, dyes, plastics, pharmaceutical and organic intermediates,manufacture Sodium metal, water electrolysis and the inorganic salt production;Preparation of borax, the chromium salt, the manganate,the phosphate and so on.