Molekula
Potassium tetrathionate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium tetrathionate is a sulfur-containing inorganic salt used in analytical chemistry and redox titrations. It serves as a reagent in iodometric methods and as a stabilizer in certain chemical processes. Available in high purity, it has a molecular weight of 302.45 g/mol, a CAS number of 13932-13-3, and a molecular formula of KOSO2SSSO3K. Store at 2 to 8 °C. Molekula supplies Potassium tetrathionate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £152.30 per pack ex VAT · £182.76 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White solid |
| Water | ≤0.8% |
| Identification | Conforms to reference |
| Assay | ≥98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 10537443 |
| CAS Number | 13932-13-3 |
| EC Number | 237-702-3 |
| Molecular Formula | KOSO2SSSO3K |
| Molecular Weight | 302.45 |
| Exact Mass | 301.7852 |
| SMILES | [O-]S(=O)(=O)SSS(=O)(=O)[O-].[K+].[K+] |
| InChIKey | UVTKHPSJNFFIDG-UHFFFAOYSA-L |
| InChI | InChI=1S/2K.H2O6S4/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2 |
| PubChem CID | 61701 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| Tariff Code | 2842908080 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, Finnish, French, German, Italian, Norwegian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Caswell No. 702A
- Dipotassium tetrathionate
- EPA Pesticide Chemical Code 075903
- POTASSIUM TETRATHIONATE (K2S4O6)
- Tetrathionate, Potassium
- Tetrathionic acid, dipotassium salt
- Tetrathionic acid, potassium salt (1:2)
- UVTKHPSJNFFIDG-UHFFFAOYSA-L
Frequently asked questions
What is potassium tetrathionate used for?
It is primarily used as a reagent in analytical chemistry and in redox titrations, particularly in iodometric methods.
What is the chemical formula and molecular weight of potassium tetrathionate?
The formula is KOSO2SSSO3K and the molecular weight is 302.45 g/mol.
How should potassium tetrathionate be stored?
It should be stored at temperatures between 2 to 8 °C to maintain stability.
What grade is available for potassium tetrathionate?
Available in analytical grade for laboratory use.
Can Molekula supply potassium tetrathionate in bulk?
Yes, Molekula can supply potassium tetrathionate in bulk quantities—please contact our sales team for details.
What documentation comes with a purchase of potassium tetrathionate?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.