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Na₂SO₄

SODIUM SULFATE IS one of the most important minerals in the chemicals industry. It is an important compound of sodium. It is a white crystalline solid when anhydrous. The decahydrate (Na₂SO₄.10H₂O) is known as Glauber's salt.

Synonyms of Sodium Sulfate

• Disodium monosulfate
• Sulfuric acid, Sodium salt
• Disodium sulfate
• Sulfuric acid, Disodium salt
• Bisodium sulfate
• Natriumsulfat
• Salt cake
• Thenardite (mineral)
• Glauber's salt (decahydrate)
• Sal mirabilis (decahydrate)
• Mirabilite (decahydrate)
• Trona

Physical Properties of Sodium Sulfate

Uses of Sodium Sulfate

• To make soaps and detergents. It is an important ingredient in powdered soaps.
• To make textiles.
• In the production of paper and paper pulp and glass.

Substitutes of Sodium Sulfate
Emulsified sulfur and sodium hydroxide (caustic soda) is sometimes used in place of sodium sulfate in paper production. In soap and detergent production also it is easily replaced by a number of products. In glass production, it is replaced by soda ash and calcium sulfate. The glass produced by the substitute is considered "less-than-perfect."

Sources of Sodium Sulfate
Approximately 12% of the salt in the Great Salt Lake of Utah is Sodium sulfate. This is equivalent to 400 million tons of sodium sulfate. Nevada, Washington and Wyoming in the United States also have identified sodium sulfate resources.

Apart from the US, deposits are also found in Canada, Mexico, Spain, Turkey, China, Egypt, Italy, Romania and South Africa.

Significant amount of sodium sulfate are also produced as a by-product from the production of other materials, like ascorbic acid, boric acid, cellulose, rayon, and silica pigments.

In paper and paper pulp industry, a small amount is recycled.