Sodium Thiosulfate commonly used in Dechlorination of municipal wastewater, pulp & paper, power, and textile water treatment plants and as an Oxygen scavenger in oil well drilling process in Mining industries. Also chemically suitable for Aluminium cation reaction.

Sodium Thiosulfate used as a Pond / Aquarium Dechlorinator.  But Sodium Thiosulfate does not treat for Chloramine, only Chlorine. Chloramine is a chemical compound composed of chlorine and ammonia and more and more utilities are converting to its use. Check with your municipal water company to learn which chemical they are using. If Chloramine is the disinfectant, please research other knowledgeable sources to learn your best solution for water treatment.

Molecular Formula  ::: Na2S2O3 - 5H2O

This product also used as a Photography as a fixing agent (hypo) to dissolve unchanged silver salts from exposed negatives.

Application

Typical Applications

Sodium Thiosulfate Anhydrous can be used for:

• Ballast water dechlorination

• Residual chlorine neutralization

• Electrochlorination BWMS

• Sodium hypochlorite-treated ballast water

• Oxidizing biocide neutralization

• Ballast water discharge preparation

• Marine water-treatment systems

How Sodium Thiosulfate Works

Sodium thiosulfate functions as a reducing agent. It reacts with residual oxidizing species and converts them into less oxidizing chemical species.

In a chlorine-treated ballast water system, sodium thiosulfate can consume residual chlorine, helping reduce the Total Residual Oxidant (TRO) concentration before discharge.

The required dosage depends on:

• Initial TRO concentration

• Ballast water volume

• BWMS technology

• Water chemistry

• Required discharge residual

• Chemical concentration

• Reaction/contact time

• Dosing-system configuration

Therefore, dosing should be calculated based on the actual BWMS operating parameters rather than using a universal fixed dosage.