Chinese name: sodium carbonate
Foreign name: Sodium Carbonate
Common name: soda, soda ash, washing soda
Chemical formula: Na2CO3
Density: 2.532g/cm3
Melting point: 851 ℃
Decomposition temperature: 744 ℃
Molecular weight: 105.99
CAS No.: 497-19-8
EINECS No.: 207-838-8; 231-867-5
Boiling point: 1600 ℃ Character: sodium carbonate is white odorless powder or particle at normal temperature. It has water absorption, and gradually absorbs 1mol/L water (about=15%) when exposed in the air. Its hydrates include Na2CO3 · H2O, Na2CO3 · 7H2O and Na2CO3 · 10H2O.
Solubility: Sodium carbonate is easily soluble in water and glycerol. 20 grams of sodium carbonate can be dissolved in 100 grams of water at 20 ℃, and the solubility is the highest at 35.4 ℃. 49.7 grams of sodium carbonate can be dissolved in 100 grams of water, which is slightly soluble in anhydrous ethanol, but not in propanol.
The solution is alkaline and can turn phenolphthalein red.
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