Sodium Thiosulfate
Allzone Trading supplies sodium thiosulfate to water treatment, industrial and municipal customers in Toronto, the GTA, Ontario, Quebec and across Canada. Sodium thiosulfate is a reducing agent used for chlorine neutralisation and in analytical and process applications. Grade and hydrate form vary by supply option and are confirmed at quotation.
At a glance
- Product
- Sodium Thiosulfate
- Grades
- Grade confirmed at quotation
- Typical applications
- Chlorine and chloramine neutralisation · Wastewater discharge dechlorination · Analytical and laboratory titration use
- Packaging
- Packaging confirmed at quotation against the supplier specification
- • Certificate of Analysis is provided against the confirmed shipment, grade and batch.
- • Manufacturer TDS and SDS are subject to grade and supplier confirmation and are available on request.
- • Grades, packaging and origin above are indicative sourcing options and are confirmed at quotation.
Available grades from container-direct sourcing
Grade confirmed at quotation
Grade, concentration and active content are quoted and confirmed against the supplier technical data sheet before any order is placed.
Typical applications
- Chlorine and chloramine neutralisation
- Wastewater discharge dechlorination
- Analytical and laboratory titration use
- Mining and metals process chemistry
- Photographic and industrial process applications
Why Canadian buyers choose us
- Municipal, industrial, wastewater, boiler/cooling, RO and pool duties quoted as separate specifications
- Grade, concentration and active content confirmed in writing before order confirmation
- Supplier technical data sheet and safety data sheet provided for the quoted grade
- Freight arranged across Toronto, the GTA, Ontario, Quebec and Western Canada
- Quantities reviewed per enquiry, from smaller lots to container loads
Typical industries served
Material identity
Sodium thiosulfate — identifiers and the names buyers use
- CAS
- 10102-17-7 (pentahydrate)
- Formula
- Na2S2O3·5H2O
- E number
- E539
Also searched as
Abbreviations
Industry terminology
Identifiers are published for material identification. The exact specification of any offered grade is confirmed against supplier documentation at quotation.
Buyer intent coverage
Sodium thiosulfate — what it is, where it is used, how it is chosen
Sodium thiosulfate is a reducing salt supplied as colourless pentahydrate crystals or as a stabilised solution. Its practical value is speed: it destroys residual chlorine and chloramine in seconds, which makes it the standard dechlorination chemical in municipal discharge, food-plant rinse water, aquaculture and analytical laboratories, and a sulphur and micronutrient source in agriculture.
Primary uses
- Dechlorination of treated water before discharge or reuse
- Quenching residual oxidiser after sanitation in food and beverage plants
- Reducing agent in mining, photographic and analytical chemistry
- Sulphur nutrition in liquid fertiliser blends
Applications
- Municipal wastewater and stormwater discharge compliance
- Food, beverage and brewery clean-in-place rinse neutralisation
- Aquaculture and hatchery water conditioning
- Gold leaching and precious-metal recovery chemistry
- Liquid fertiliser programmes on Prairie and Ontario cropland
Advantages
- Reacts with residual chlorine almost instantly across a wide pH range
- Handled far more safely than sulphur dioxide or bisulphite gas systems
- Available as crystal for on-site make-up or as a ready solution
- Well-characterised stoichiometry makes dosing straightforward to control
Limitations to consider
- Overdosing depresses dissolved oxygen in the receiving water
- Crystals cake if the storage area cycles between warm and cold
- Solutions can support microbial growth if held too long without control
How to choose the right grade
- Decide between crystal and solution based on whether the site can make up batches safely
- Confirm the concentration basis of any solution before comparing offers
- Specify the purity needed — analytical and pharmaceutical duties are far tighter than water treatment
- Check the dosing-pump material compatibility for the concentration you intend to run
Typical grades
- Technical grade crystal for water treatment
- Photographic and analytical grade
- Pharmacopoeial grade
- Stabilised aqueous solution
Comparable materials — how Sodium thiosulfate sits against alternatives
- Sodium bisulphite or metabisulphite for dechlorination
- Ascorbic acid where a food-contact-friendly quench is required
- Activated carbon for passive chlorine removal
Comparable-material reference. Grade selection is confirmed at RFQ against your process.
Procurement coverage
How to specify, order and receive Sodium thiosulfate
Written for procurement, quality and technical buyers in Canada and the United States. No numeric price, MOQ, stock or lead-time value is published — those are confirmed per shipment in the quotation and against the confirmed batch.
How buyers specify at RFQ
- Assay and hydrate form (pentahydrate or anhydrous)
- Solution concentration where a liquid is required
- Insoluble matter, sulphite and heavy-metal limits
- Crystal size for dissolution rate
Packaging options (industry-standard)
- 25 kg bag for crystal material
- FIBC bulk bag for high-volume water-treatment sites
- IBC tote or bulk tanker for solution supply
- Packaging options and available pack sizes are confirmed with each quotation.
Storage & handling
- Store crystals sealed, cool and dry to prevent caking and efflorescence
- Keep away from acids and strong oxidisers — contact liberates sulphur dioxide
- Use corrosion-resistant dosing equipment and flush lines after shutdown
Documentation available
- Technical data sheet (TDS) for the offered grade
- Safety data sheet (SDS) in the format required for Canadian import
- Certificate of analysis (COA) against the confirmed batch
- Documentation is confirmed per batch at quotation; availability depends on the grade and supplier offered.
RFQ checklist for sodium-thiosulfate-canada
Include these fields to receive an accurate Canada-landed quotation
- Application and the oxidiser being quenched
- Crystal or solution, and required concentration
- Dosing rate and treated water volume
- Annual volume and volume per shipment
- Packaging format your plant can receive
- Documentation and regulatory letters required
- Delivery province or port of discharge
Technical & procurement detail
Where sodium thiosulfate is used+
Sodium thiosulfate is a reducing agent used for chlorine neutralisation and in analytical and process applications. Grade and hydrate form vary by supply option and are confirmed at quotation.
Application areas are quoted separately+
Municipal water, industrial process water, wastewater, boiler and cooling water, reverse osmosis and swimming pool applications are treated as distinct specifications. Products supplied for one of these duties are not presented as interchangeable with another. State the intended application in your enquiry so the correct specification is reviewed with the supplier.
How specifications are confirmed+
Allzone does not publish assumed purity, concentration, active content, packaging, origin, certification or regulatory approval values. The grade, specification and documentation are confirmed in writing against supplier technical data sheets and safety data sheets before an order is placed. Request the technical data sheet and safety data sheet for the exact grade under consideration.
Frequently asked questions
What grade of sodium thiosulfate do you supply?+
The grade and specification are confirmed at quotation against the supplier technical data sheet. No purity, concentration or certification value is published in advance.
Can I request a technical data sheet and a safety data sheet?+
Yes. Both the supplier technical data sheet and the safety data sheet for the quoted grade are provided on request and should be reviewed before purchase and use.
Do you deliver sodium thiosulfate across Ontario and Quebec?+
Yes. Freight is arranged across Toronto, the GTA, Ontario, Quebec and Western Canada, and the delivery method is confirmed with the quotation.
What quantities can you supply?+
Quantities are reviewed per enquiry, from smaller lots to container loads.
Technical knowledge for Sodium Thiosulfate Supplier — Ontario & Canada
Engineering and purchasing guidance written for this material — understand it, apply it, compare options, specify a grade, and fix production problems.
Foundation Articles
Comparison Articles
Related products
Materials commonly quoted alongside Sodium Thiosulfate by the same plants.
Sodium Metabisulfite
Dechlorination and reducing agent — dechlorination of reverse osmosis feedwater
Sodium Bisulfite
Dechlorination and reducing agent — dechlorination of treated water and effluent
Hydrochloric Acid (Muriatic Acid)
Mineral acid — pH reduction in water and wastewater treatment
Need a quote on Sodium Thiosulfate?
Request pricing, TDS/SDS and available documentation. We usually acknowledge enquiries within one business day; samples are subject to supplier availability and product classification.