7772-98-7 Sodium thiosulfate Sodium thiosulfate Price
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Introduction
Product name: Sodium Thiosulphate
CAS NO.: 7772-98-7
Appearance: White powder
Free sample: Available
Storage:Cool Dry Place
Usage:Food Supplement Health
Shelf Life:2 Years
Form:Power
Sodium Hyposulfite (Na2S2O3), also spelled sodium thiosulphate, is an inorganic compound that is typically available as the pentahydrate, Na2S2O3·5H2O. The solid is an efflorescent (loses water readily) crystalline substance that dissolves well in water. It is also called sodium hyposulfite or “hypo”.
It is on the World Health Organization's List of Essential Medicines, the most important medications needed in a basic health system.
Two polymorphs are known of the pentahydrate. The anhydrous salt exists in several polymorphs. In the solid state, the thiosulfate anion is tetrahedral in shape and is notionally derived by replacing one of the oxygen atoms by a sulfur atom in a sulfate anion. The S-S distance indicates a single bond, implying that the terminal sulfur bears significant negative charge and the S-O interactions have more double-bond character.
On an industrial scale, sodium thiosulfate is produced chiefly from liquid waste products of sodium sulfide or sulfur dye manufacture.
In the laboratory, this salt can be prepared by heating an aqueous solution of sodium sulfite with sulfur or by boiling aqueous sodium hydroxide and sulfur according to this equation: 6 NaOH + 4 S → 2 Na2S + Na2S2O3 + 3 H2O
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