Soda Ash (Na₂CO₃) 497-19-8

Soda Ash, chemically known as sodium carbonate (Na₂CO₃), is a white, odorless powder or granular solid with a molecular weight of 105.99 g/mol. It is one of the most important industrial chemicals by volume, produced primarily through the Solvay process or from natural trona ore. It is available in two main forms: light soda ash (fine powder) and dense soda ash (larger granules).

Light soda ash is a fine powder with lower bulk density, dissolves faster, and is preferred for chemical manufacturing, detergent production, and applications requiring rapid dissolution. Dense soda ash has larger granules with higher bulk density, produces less dust during handling, and is the preferred form for glass manufacturing where dust control is important. Both forms have the same chemical purity.

Soda ash serves as a flux in glass manufacturing, lowering the melting temperature of silica from approximately 1,700°C to around 800°C. This significantly reduces energy consumption and production costs. Soda ash typically comprises 12-15% of the glass batch by weight. Dense soda ash is preferred in this application due to lower dusting and better batch uniformity.

In water treatment, soda ash is used for pH adjustment and water softening. It raises the pH of acidic water and precipitates calcium and magnesium ions as insoluble carbonates, reducing water hardness. It is widely used in municipal drinking water treatment, swimming pool pH control, and industrial process water conditioning.

Beyond glass and detergents, soda ash is used in the production of various sodium compounds including sodium bicarbonate, sodium silicates, and sodium phosphates. It is used in pulp and paper processing, textile processing, petroleum refining, and as a flux in metallurgy. It is also used in flue gas desulfurization to remove sulfur dioxide from industrial emissions.