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sodium carbonate|way

CAS Registry Number (CASRN):

۴۹۷-۱۹-۸ , 5968-11-6 ,


sodium carbonate|way ,


Na2CO3 ,

purity (%):

99.5 ,

CAS Registry Number (CASRN):

۴۹۷-۱۹-۸ , 5968-11-6 ,

SAX Number:

45P3261C7T ,

Molar mass (g/mol):

105.9884 ,

Density (g/cm3):

2.54 ,

Melting point (°C):

851 ,

Boiling point (°C):

‎1600 ,

Acidity (pKa):

3.67 ,

solubility in water (g/100g):

70 ,


sodium carbonate|way

Sodium carbonate is either found naturally or is manufactured from sodium chloride (common salt). It has many uses, notably to make glass.

Uses of sodium carbonate

Two forms of sodium carbonate (soda ash) are used -heavy and light. The light form is obtained first and some is then converted into the heavy form. Light sodium carbonate contains less than 0.5% sodium chloride. Heavy sodium carbonate is obtained by hydrating light sodium carbonate to the monohydrate (Na2CO3.H2O) and then dehydrating it to give a product with an increased crystal size and density.

The two grades have different uses.

The major uses of heavy sodium carbonate are as a solid, particularly in making glass, where it is used as a flux in the melting of silica (sand).

The uses for light sodium carbonate are traditionally where the chemical is required in solution.

Manufacture of sodium carbonate

There are two main sources of sodium carbonate:

a) from salt and calcium carbonate (via the ammonia soda (Solvay) process)

b) from sodium carbonate and hydrogencarbonate ores (trona and nahcolite)

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