Sodium Thiosulfate Pentahydrate

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.

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.

Dosage

Important Dosing Consideration

The required quantity of Sodium Thiosulfate should be determined from the actual TRO measurement and BWMS dosing requirements. Overdosing or underdosing can affect ballast-water treatment performance and discharge conditions.

For shipboard operation, dosing should therefore be controlled through the vessel's approved BWMS procedures, TRO monitoring system, and chemical-dosing equipment.

Sodium Thiosulfate for Ballast Water Neutralization

Many Ballast Water Management Systems (BWMS) use an oxidizing treatment process to control organisms in ballast water. Depending on the technology, treatment may generate or introduce free chlorine, hypochlorite, or other oxidizing residuals.

Before discharge, residual oxidant may need to be neutralized.

Sodium Thiosulfate Anhydrous can be dosed into the treated ballast water to reduce residual oxidizing compounds.

This makes it an important chemical for selected ballast-water neutralization systems.

Remarks

Ballast Water Treatment Chemical Supplier

For shipowners, ship managers, BWMS operators, marine chemical distributors, and vessel-management companies, selecting a consistent-quality Sodium Thiosulfate Anhydrous supplier is important for reliable neutralization performance.

When purchasing the product, customers should verify:

• Chemical purity

• Anhydrous specification

• Batch consistency

• COA

• SDS

• Packaging

• Solubility

• Storage requirements

• Bulk availability

• Compatibility with the BWMS dosing system

Supply Locations

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