Sodium thiosulfate

//Sodium thiosulfate

Sodium thiosulfate

Used for the neutralization of chlorine and/or Ovadine (PVP Iodine) solutions at hatcheries and aquaculture facilities.

Contact us for pricing and assistance at Syndel’s USA office at (800) 283-5292, or Syndel’s Canadian Office at (800) 663-2282.  For International inquiries email



Sodium Thiosulfate can be used for the neutralization of chlorine and/or Ovadine (PVP Iodine) solutions at hatcheries and aquaculture facilities.

Chlorine is highly toxic to fish and crustaceans so, whether disinfecting tanks or equipment with sodium hypochlorite (bleach) or using tap water during transport or stocking, it is crucial to remove chlorine prior to the introduction of fish or other aquatic life.

For the neutralization of Chlorine solutions: – The amount of sodium thiosulfate required can vary with the pH of the water.  A range of approximately 2 to 7 parts sodium thiosulfate to neutralize one part chlorine is generally suggested, for example to neutralize 1 liter of a 200 ppm chlorine solution, approximately 0.4 – 1.4 grams of sodium thiosulfate would be required or to neutralize one gallon of a 200 ppm chlorine solution, approximately 1.5 – 5.3 grams would be required.  The use of a chlorine test kit is recommended to determine final chlorine concentrations.

Available Sizes within the USA: 50lb Bag
Available Sizes within Canada: 25kg Bag

For additional Syndel Product information such as availability, package sizes, pricing, and approvals/application details relevant to your country or region, please contact Syndel,

Resource Downloads

In’s and Outs Of Dechlorination

Sodium Thiosulfate SDS

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