Soda Ash Medium

Soda Ash Medium

Chemical formula: Na2CO3

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Structural formula: Na -- O -- C -- O -- Na
Common names: Sodium carbonate, calcined soda, disodium carbonate
CAS registry number: 497-19-8

Physical and chemical properties

Soda Ash Medium is a white, odourless, uniform product, free from dirt and other foreign matter. Soda ash has a tendency to absorb moisture from the atmosphere. The moist soda ash then starts absorbing atmospheric carbon dioxide. This phenomenon of absorption of moisture and carbon dioxide by soda ash is known as weathering. After weathering, soda ash is likely to contain appreciable moisture and sodium bicarbonate, but the total alkali content of the bag does not change. Soda ash has a tendency to cake when it comes in contact with moisture and, consequently, becomes lumpy.

Characteristics Units IS 251 : 1998
Molecular weight 106
Bulk density Kg/m3 751 - 950 751 - 950
Volatile matter content (at the time of packing) %, max 2 0.80
Total alkalinity (as Na2CO3 ) %, min 98.5 99.0
Sulphates (as Na2SO4) %, max 0.08 0.03
Chlorides (as NaCl) %, max 1.0 0.80
Iron (as Fe2O3) => By colorimetric
By spectrophotometric method
%, max

Matter insoluble in water %, max 0.15 0.03

Applications :

Soda Ash Medium is one of the basic industrial chemicals and thus finds use in glass, silicate, bichromate and other industries.


Available in 50 kg HDPE / PP bags with lamination.


Soda Ash Medium should be stored under cover in a cool, dry place and the bags should not be stacked more than 15 bags high.