Sodium Thiosulfate Pentahydrate

Sodium Thiosulfate 64% Pentahydrate

Sodium Thiosulfate 64% Solid is a white inorganic crystalline compound.   Hydrated sodium thiosulfate with 5 mol eq of water. 

To support the North American market in the continuing challenges in the supply chain environment, INEOS Calabrian is now offering an American-manufactured product.   We also have the capability to also produce product in a highly concentrated liquid form.  

INEOS’s product is consistent in quality and has a narrow specification because it is produced on demand and derived from our SO2Clean®.



  • Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants
  • Oxygen scavenger
  • Oil well drilling process
  • Cyanide Destruction Leaching- Mining, Gold and Cobalt Aluminium cation reaction
  • Concert Additive


Chemical Composition

Sodium Thiosulfate, wt%

63 +/- 1%

Sodium Thiosulfate, Penta


Sulfite, wt%

1.5 max.


6.5 – 9.5


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