Sodium carbonate
Sodium carbonate chemical formula Na2CO3, under normal circumstances as a white powder, is a strong electrolyte. The density is 2.532g/cm3, the melting point is 851°C, easily soluble in water, with the commonness of salt, is a weak acid salt, slightly soluble in anhydrous ethanol, insoluble in propanol, soluble in water after hydrolysis reaction, making the solution alkaline, has a certain corrosion, can neutralize with acid, generate the corresponding salt and release carbon dioxide. It decomposes at high temperatures to form sodium oxide and carbon dioxide. Long-term exposure to the air can absorb water and carbon dioxide in the air, generate sodium bicarbonate, and form hard. It is very hygroscopic, easy to form hard, and does not decompose at high temperatures.
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Description
Product name: Sodium carbonate
Alias: Soda ash
Molecular formula: CH2O3.2Na
Appearance: White crystalline powder.
CAS NO.: 497-19-8
EINECS NO.: 207-838-8
Application
1, The glass industry is the largest source. Mainly used for float glass, picture tube glass, optical glass and so on.
2, Used in the chemical industry, metallurgy, etc. The use of heavy soda ash can reduce the flying of alkali dust, reduce raw material consumption, improve working conditions.
3, As a buffer, neutralizer, and dough improver, can be used in pastry and noodle food, according to the production needs of appropriate use.
4, As a detergent for wool rinsing, bath salts and medicine, tanning alkali agent in leather.
5, Used in the food industry, as a neutralizer, and leavening agent, such as the manufacture of amino acids, soy sauce and pasta food such as steamed bread, bread, etc. It can also be mixed into alkali water and added to pasta to increase elasticity and ductility. Sodium carbonate can also be used to produce MSG
6, Color TV special reagent
7, Used in pharmaceutical industry, as an acid antidote, osmotic laxative.
8, Used for chemical and electrochemical oil removal, chemical copper plating, corrosion of aluminum, electrolytic polishing of aluminum and alloy, chemical oxidation of aluminum, sealing after phosphating, rust prevention between processes, electrolytic removal of chromium coating and removal of chromium oxide film, etc., also used in pre-plating copper, steel plating, steel alloy plating electrolyte
9, Metallurgical industry used as smelting flux, flotation agent for beneficiation, steelmaking and antimony smelting used as desulfurizer.
10, Printing and dyeing industry used as water softening agent.
11, The leather industry is used for degreasing raw skin, neutralizing chromium tanning leather and improving the alkalinity of chromium tanning liquid.
12. The standard of acid calibration in quantitative analysis. Determination of aluminum, sulfur, copper, lead and zinc. Urine and blood glucose were tested. Analysis of cosolvent of silica in cement. Metallographic analysis of metals, etc.
Risk
Sodium carbonate dust has an irritating effect on the skin, respiratory tract and eyes. Prolonged contact with this solution may lead to eczema, soft skin and dermatitis.
Fire protection measures
In case of fire, water, dry powder extinguishing agent, foam or carbon dioxide can be used to rescue.
