Density of Sodium Thiosulfate

Sodium thiosulphate, also spelled sodium thiosulfate, is an odorless and colorless crystal chemical. The compound results from the combination of sulfur, sodium and oxygen. It is more dense than liquid water.

  1. Nomenclature

    • The chemical is known under several names besides the official IUPAC nomenclature, sodium thiosulfate. It was formerly referred to as sodium hyposulfite, hyposulphite of soda or the diminutive "hypo". Sodium thiosulfate is most commonly found in pentahydrate form.

    Properties

    • The molecular formula of sodium thiosulfate is Na2S2O3. It has a a density of 1.67 grams per cubic centimeter and a molar mass of 158.108 grams per mole. Like water, it has a boiling point of 100 degrees Celsius.

    Uses

    • In laboratory settings it can be used for the reduction of iodine to iodide. It is also employed as a photographic fixer. Other uses for sodium thiosulfate include gold extraction, dechlorination of water, leather tanning and functioning as an antidote for cyanide poisoning.

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