Sodium sulfate, Yuanming powder, anhydrous thenardite

[English name] sodium sulfate

[structure or molecular formula]

Na ₂ SO ₄

[relative molecular weight or atomic weight] 142.44

[density] 1.464 (ten water), 2.698 (anhydrous)

[melting point (°C)] 32.4 (decahydrate); 884 (anhydrous)

【Properties】

Decahydrate: granules or powdery crystals with bitter taste; anhydrate: white powder.

【use】

It is used in the manufacture of sodium sulfide, pulp, glass, water glass, enamel, ultramarine, and as an antidote to laxatives and strontium salt poisoning.

[preparation or source]

Industrially, it is a by-product of the production of hydrochloric acid from salt and sulfuric acid. Natural minerals have thenardite .

【other】

It is rapidly weathered in the air and becomes a white powder of anhydrate.

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