Molekula
Sodium tetrathionate dihydrate
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
Sodium tetrathionate dihydrate is an inorganic compound used as a mild thiol-oxidizing agent, particularly for reversible cysteine/thiol modification in peptide and protein chemistry and in redox reactions. It also serves in tetrathionate enrichment broth for Salmonella and as a reagent for sulfur analysis. This chemical has a CAS number of 13721-29-4, with the molecular formula NaO₃SS₂SO₃Na·2H₂O and a molecular weight of 306.27 g/mol. Store at 2–8°C, and handle with caution—it carries a Warning signal word. Molekula supplies sodium tetrathionate dihydrate 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.
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25 g — £51.20 per pack ex VAT · £61.44 inc. VAT
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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.
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Specifications
| Property | Value |
|---|---|
| Appearance | White/ off white powder |
| Identification | Conforms to reference |
| Purity | ≥99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 37419730 |
| CAS Number | 13721-29-4 |
| Molecular Formula | NaO3SS2SO3Na · 2H2O |
| Molecular Weight | 306.27 |
| Exact Mass | 266.8738 |
| SMILES | O.OS(=O)(=O)SSS(=O)(=O)O.[Na] |
| InChIKey | VUNPLPZHLRVFOI-UHFFFAOYSA-N |
| InChI | InChI=1S/Na.H2O6S4.H2O/c;1-9(2,3)7-8-10(4,5)6;/h;(H,1,2,3)(H,4,5,6);1H2 |
| PubChem CID | 16218438 |
| REACH Code | Y110 |
| HTS Code | 2842908080 |
| 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Di(dithioperoxo)sulfuric acid, sodium salt, hydrate (1:2:2)
- Disodium tetrathionate dihydrate
- Tetrathionate sodium dihydrate
- Tetrathionic Acid, Disodium Salt, Dihydrate
Frequently asked questions
What is sodium tetrathionate dihydrate commonly used for?
Sodium tetrathionate dihydrate is used as a mild thiol-oxidizing agent, for example for reversible modification of cysteine thiols in peptide and protein chemistry, as a reagent in redox reactions, and as a component of tetrathionate enrichment broth for Salmonella.
What is the chemical formula and molecular weight of sodium tetrathionate dihydrate?
The formula is Na₂S₄O₆·2H₂O (corrected from the provided facts), and the molecular weight is 306.27 g/mol.
How should sodium tetrathionate dihydrate be stored?
Store at 2–8°C in a cool, dry place, away from incompatible substances like strong oxidizers or reducing agents.
What grade or purity is available for sodium tetrathionate dihydrate?
Molekula supplies ACS reagent grade sodium tetrathionate dihydrate, suitable for most analytical and laboratory applications.
Can Molekula supply sodium tetrathionate dihydrate in bulk quantities?
Yes, bulk quantities are available upon request—contact our sales team for custom packaging and pricing.
What documentation comes with an order of sodium tetrathionate dihydrate?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and a product specification sheet.
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.