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Laboratory & industrial chemicalsQuotations, SDS and COA on request

Inorganic Salts

Sodium Thiosulfate, Pentahydrate, Crystals

High-purity sodium thiosulfate crystals for industrial applications.

Article code
HYPO5
CAS
10102-17-7
Purity
> 99%
Category
Inorganic Salts

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Properties

Article / SKU
HYPO5
Chemical Formula
Na2S2O3•5H2O
Molecular Weight
248.19
Purity
> 99%
Appearance
White crystals
Iron
< 10 ppm
Heavy Metals
< 6 ppm
Insoluble Matter
< 0.02%
CAS#
10102-17-7

Packaging options

  • 1 Lb
  • 5 Lbs
  • 10 Lbs
  • 55 Lbs

Details

Sodium Thiosulfate, Pentahydrate, Reagent, ACS grade, also known as Sodium Hyposulfite (Na2S2O3•5H2O), is a high-purity chemical used across a variety of industries. With a molecular weight of 248.19, its primary applications include photographic fixer, chrome tanning, water dechlorination, silver extraction, bleaching, and iodometry. Additionally, it serves as a reagent, mordant, and reducing agent in dyeing processes. Its white crystalline appearance and >99% purity ensure reliable performance in technical and industrial uses.

Photographic fixer

Chrome tanning

Water dechlorination

Silver extraction from ores

Bleaching and paper making

Reducing agent in chrome dyeing

Reagent for iodometry

Making colloidal sulfur

Mordant for textiles

Handle with care. Review the Material Safety Data Sheet (MSDS) for safety instructions and best practices before use.

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