Translucent white flaky solid, caustic soda is a basic chemical raw material, widely used in papermaking, synthetic detergent and soap, viscose fiber, rayon and cotton textiles and other light and textile industry, pesticides, dyes, rubber and chemical industry, petroleum drilling, refining petroleum grease and tar oil refining industry and the defense industry, machinery industry, wood processing, metallurgical industry, pharmaceutical industry and urban construction and other aspects. Also used in the manufacture of chemicals, paper, soap and detergent, artificial silk and cellophane, processing bauxite alumina, aluminum is also used at the silk textile, water treatment and so on.
Basic Information：
Chinese name: Caustic
English Name : Caustic soda
Chemical name: sodium hydroxide;
Commonly known as: caustic soda; caustic soda; caustic soda; caustic; solid base of Ge Shi.
Molecular foemula: NaOH
Property:
Pure colorless transparent crystal, relative density 2.130. Melting point 318.4 ℃. Boiling point of 1390 ℃. Commercially available solid and liquid caustic soda has two types: pure solid caustic soda were white, block mounted, sheet, rod, granular, crisp; pure liquid caustic soda is colorless and transparent liquid. It has a strong hygroscopic solid caustic soda. Soluble in water, dissolved when the heat, alkaline aqueous solution, a greasy feel; soluble in ethanol and glycerol; insoluble in acetone, ether. Corrosive, fiber, skin, glass, ceramics and other corrosive effect. Aluminum and zinc reaction, and nonmetal boron and silicon emit hydrogen; disproportionation reaction with chlorine, bromine, iodine and other halogen; and salt and water and acids and the role played.
When you save to pay attention to the seal of solid sodium hydroxide, to prevent exposure to moisture absorption and deliquescence or carbon dioxide in the air. When in full bloom with caustic soda bottles or other forms of sodium hydroxide, a glass stopper is not available, it should be replaced with a stopper, because sodium hydroxide will work with silica glass produced by the reaction of sodium silicate and lead stopper bottle bonding difficult to open.
Basic characteristics:
Extremely corrosive, its solution or dust spilled on the skin, especially splashed mucous membranes, can produce soft crust, and can penetrate deep tissue. After the burn scar left. Splashed into eyes, not only damage the cornea, but also make the eye deep tissue damage. If accidentally splashed on skin, immediately wash with water 10min; if splashed into eyes, rinse immediately with water or saline 15min, and then enter a 2% novocaine. In severe cases, quick to the hospital for treatment. Caustic dust in the air maximum allowable concentration 0.5mg / m3. You must wear overalls, masks, protective glasses, rubber gloves, rubber apron, gumboots and other protective clothing when working operator. It should be painted in neutral and hydrophobic ointment on the skin
