Sodium sulfate is the inorganic compound with formula Na2SO4 as well as several related hydrates.
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17 Facts About Sodium sulfate
2.
Sodium sulfate named it, because of its medicinal properties: the crystals were used as a general-purpose laxative, until more sophisticated alternatives came about in the 1900s.
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3.
Sodium sulfate is unreactive toward most oxidizing or reducing agents.
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4.
Sodium sulfate reacts with sulfuric acid to give the acid salt sodium bisulfate:.
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5.
Crystalline sodium sulfate decahydrate is unusual among hydrated salts in having a measurable residual entropy of 6.
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Japan6.
Anhydrous sodium sulfate occurs in arid environments as the mineral thenardite.
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7.
Sodium sulfate is found as glauberite, a calcium sodium sulfate mineral.
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8.
About one third of the world's sodium sulfate is produced as by-product of other processes in chemical industry.
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9.
Second major production of sodium sulfate are the processes where surplus sodium hydroxide is neutralised by sulfuric acid, as applied on a large scale in the production of rayon.
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10.
Formerly, sodium sulfate was a by-product of the manufacture of sodium dichromate, where sulfuric acid is added to sodium chromate solution forming sodium dichromate, or subsequently chromic acid.
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11.
Alternatively, sodium sulfate is or was formed in the production of lithium carbonate, chelating agents, resorcinol, ascorbic acid, silica pigments, nitric acid, and phenol.
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12.
Bulk sodium sulfate is usually purified via the decahydrate form, since the anhydrous form tends to attract iron compounds and organic compounds.
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13.
Sodium sulfate is used as a fining agent, to help remove small air bubbles from molten glass.
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14.
Sodium sulfate is important in the manufacture of textiles, particularly in Japan, where it is the largest application.
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15.
Sodium sulfate is added to increase the ionic strength of the solution and so helps in "levelling", reducing negative electrical charges on textile fibres so that dyes can penetrate evenly .
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16.
Sodium sulfate is added to the solution until the crystals no longer clump together; the two video clips demonstrate how the crystals clump when still wet, but some crystals flow freely once a sample is dry.
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17.
In 1953, sodium sulfate was proposed for heat storage in passive solar heating systems.
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