الوصف

Name:Sodium Carbonate;
Molecular formula:Na2CO3ï¼›
Molecular weight:**5.*9ï¼›
Density:2.**2g/cm³ï¼›
Melting point:**1℃；
Boiling point:***0℃；
Decomposition temperature:**4℃；
CAS：*******8；
EINECS：********8;********5；
Properties: a white odorless powder or particle at normal temperature;
Characteristics: water absorbability;
Solubility: soluble in water and glycerin, soluble in anhydrous ethanol, and difficult to dissolve in propanol;
Chemical properties: the aqueous solution of sodium carbonate is strongly alkaline (pH=*1.6) and has a certain corrosivity,double decomposition with acid,calcium salt and barium salt;There are 3 kinds of sodium carbonate containing crystalline water:Na2CO3·H2O、Na2CO3·7H2O、Na2CO3·*0H2Oï¼›strong stability;But also decomposition in high temperature , generating sodium oxide and carbon dioxide;Long term exposure in the air can absorb moisture and carbon dioxide in the air to produce sodium bicarbonate, and caked;Crystalline hydrate soda of sodium carbonate (Na2CO3 - *0H2O) easy weathering in dry air;
Application:
1. Glass industry: raw materials;
2. Food industry: buffer, neutralizer, puffing agent, dough modifier;
3. Wool washing, bath salts, medicine: detergent;
4. Leather: alkali agent;
5. Color TV: special reagents;
6. Pharmaceutical industry: antacid, osmotic laxatives;
7. Chemical and electrochemical degreasing, electroless copper plating, aluminum etching, electrolytic polishing of aluminum and alloy, chemical oxidation of aluminum, sealing after phosphating, rust prevention between processes, electrolytic stripping of chromium coating,
removing oxidation film of chromium, copper plating, steel plating, and plating of steel alloy electrolyte,electrolyte liquid for pre plated copper, steel, plated steel alloy;
8. Metallurgical Industry: smelting flux, flotation agent for mineral processing, steelmaking and refining antimony as a desulfurizer;
9. Printing and dyeing industry: water softener;
*0. Leather industry: raw materials of leather degreasing, neutralizing chrome tanned leather, chrome tanning solution alkalinity,increasing chrome tanning solution alkalinity;
*1. Quantitative analysis: calibration of the benchmark for acid solution, determination of aluminum, sulfur, copper, lead and zinc, examination of urine and whole blood glucose;cosolvent of analysis the silica in cement;metallographic analysis of metals, etc.
*2. Other: light industry, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, metallurgy, textile, petroleum, medicine, etc.