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Example of using our Thiosulfates

General information

Thiosulfates are derivatives of thiosulfuric acid, which is unstable in the free state. The industrially most important thiosulfates are sodium and ammonium thiosulfate.

Areas of application

Sodium thiosulfate is used in many ways. Examples for this are:

  • Removal of chlorine from bleached fabric and paper
  • Extraction of silver chloride from silver ore
  • Preparation of galvanic gold and silver solutions
  • Bleaching agents for straw, bone, ivory
  • Antidotes for cyanide poisoning
  • Use for drinking water treatment

Sodium thiosulphate is also used in analogue photography as a fixing salt for fixing the exposed materials, since it dissolves the unexposed and therefore undeveloped silver bromide as a soluble dithiosulphate-argentate complex.

Use of sodium thiosulfate as a fixing salt in a darkroom

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Products by MCAS

Discover our Thiosulfates


Sodium thiosulfate
    • Formula: H10Na2O8S2
    • Molecular mass: 248.18 g/mol
    • CAS-No.: 10102-17-7
    • EINECS-No.: 600-156-5
    • RID / ADR: N/A
    • WGK: N/A
      • Hazard statements: N/A
      • Precautionary statements: N/A
    Sodium thiosulfate
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    Advice by MCAS

    Use our advise for Thiosulfates

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