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Sodium Thiosulfate
Sodium Thiosulfate (Product Code: SCI-415/174) is an analytical reagent grade sodium salt used for rate-of-reaction experiments with dilute acid and for iodine titrations in school and college chemistry laboratories. It comes in a 100 g pack with its MSDS, a compact quantity for a titration kit in school or college practicals. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Grade | Analytical reagent |
| Common name | Hypo |
| Pack capacity | 100 g |
| MSDS | Supplied with the product |
| Shelf life | Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. |
| Product code | SCI-415/174 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Sodium Thiosulfate Used For?
The disappearing-cross experiment is the usual way to study reaction rate. Sodium thiosulfate solution is poured into a flask standing over a cross drawn on paper, dilute hydrochloric acid is added, and students time how long the cross takes to vanish behind the cloudy yellow sulphur that forms. Repeating the run at other concentrations or temperatures shows how each factor speeds up the reaction.
In volumetric analysis, a standardised thiosulfate solution is run from a burette into iodine released in iodometric determinations, with starch indicator turning blue-black until the end point, when the colour disappears sharply. That makes it a core reagent in a volumetric analysis kit for colleges. The salt is also known as hypo from its long use as a photographic fixer, and because the acid reaction gives off some sulphur dioxide, rate experiments belong in a ventilated room.
What to Specify When Ordering
- The number of 100 g packs for each laboratory.
- Whether the salt is for rate experiments, iodine titrations or both, so the quotation can include matching reagents.
- Companion items such as hydrochloric acid, soluble starch, potassium iodide or burettes.
Supplier
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, which sources Sodium Thiosulfate for chemistry laboratories and supplies each 100 g pack with its MSDS. Colleges setting up titration benches can add burettes, conical flasks, starch and potassium iodide to the same enquiry, and the company serves schools, dealers and importers in India and international markets. Company information is on the ScienceLab profile.
Related Laboratory Equipment
Reagents and glassware for thiosulfate rate experiments and iodometric titrations:
- Hydrochloric Acid — reacts with thiosulfate in the disappearing-cross experiment.
- Soluble Starch — the indicator for the iodine end point.
- Potassium Iodide — releases the iodine that thiosulfate titrates.
- Burette — delivers the thiosulfate solution during titration.
- Sodium Thiosulphate(Thio) — another listing of the salt in a different pack.
Explore further in Laboratory Equipment.
Frequently Asked Questions
What is the disappearing cross experiment with Sodium Thiosulfate?
It is a rate-of-reaction experiment in which Sodium Thiosulfate solution reacts with dilute hydrochloric acid to form a cloudy sulphur precipitate. Students time how long a cross under the flask takes to disappear, then repeat at different concentrations or temperatures to compare rates.
Why is Sodium Thiosulfate used in iodine titrations?
Sodium Thiosulfate reacts quickly and completely with iodine, reducing it to colourless iodide, so it measures how much iodine a reaction has released. Starch indicator marks the end point when the blue-black colour disappears, and the thiosulfate solution should be standardised before accurate work.
How much Sodium Thiosulfate is in one pack?
Each pack of Sodium Thiosulfate SCI-415/174 contains 100 g of analytical reagent grade salt and is supplied with its MSDS. Tell us how many packs your laboratories need in your enquiry, and we will quote that number of packs.
Is hypo the same as Sodium Thiosulfate?
Yes. Hypo is the traditional name for Sodium Thiosulfate, taken from its older name, sodium hyposulphite, and its use as a photographic fixer. Sodium Thiosulfate SCI-415/174 is the analytical reagent grade salt, packed as 100 g for laboratory work.
How should Sodium Thiosulfate be stored?
Keep Sodium Thiosulfate SCI-415/174 tightly closed in a cool, dry place away from acids, which decompose it, and make up solutions fresh or restandardise them. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted.
Who supplies Sodium Thiosulfate SCI-415/174?
Sodium Thiosulfate SCI-415/174 is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India. The company sources the reagent and sends it with its MSDS to schools, colleges, analytical laboratories and dealers in India and international markets.
Request a Quote
Request Sodium Thiosulfate through the ScienceLab contact page, or add it to the enquiry cart with the acid, starch and burettes for your rate and titration practicals.
Last updated: 24 September 2026
