Molekula
Dipotassium disulfate
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
Dipotassium disulfate is a white crystalline solid used in chemical synthesis and as a reagent in laboratory research. It is an acidic salt used mainly as an acidic fusion flux for decomposing refractory metal oxides and minerals in analytical chemistry, and is employed in the preparation of other sulfur compounds. CAS: 7790-62-7, Molecular Formula: K2S2O7, Molecular Weight: 254.32 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies Dipotassium disulfate 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 — £30.90 per pack ex VAT · £37.08 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 | Colourless crystals or molton lump |
| Heavy metals | ≤0.0005% |
| Identification | Conforms to reference |
| Chloride (Cl-) | ≤0.001% |
| Purity | ≥98.0% |
| Water insoluble matter | ≤0.01% |
| Iron (Fe) | ≤0.001% |
| Arsenic (As) | ≤0.0003% |
| Calcium (Ca) | ≤0.005% |
| Phosphate (PO4)3- | ≤0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 (6.1) |
| Packing Group | I |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 33747986 |
| CAS Number | 7790-62-7 |
| IUPAC Name | dipotassium;sulfonato sulfate |
| EC Number | 232-216-8 |
| Molecular Formula | K2S2O7 |
| Molecular Weight | 254.32 |
| Exact Mass | 253.836 |
| SMILES | [O-]S(=O)(=O)OS(=O)(=O)[O-].[K+].[K+] |
| InChIKey | KAQHZJVQFBJKCK-UHFFFAOYSA-L |
| InChI | InChI=1S/2K.H2O7S2/c;;1-8(2,3)7-9(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2 |
| PubChem CID | 62681 |
| UN Number | UN2923 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2833.29.5190 |
| Tariff Code | 2833298080 |
Safety & GHS
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Corrosive
GHS05
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Toxic
GHS06
Hazard statements
- EUH071 Corrosive to the respiratory tract
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
- H330 Fatal if inhaled
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P284 Wear respiratory protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P309+311 IF exposed or you feel unwell: Call a POISON CENTER or doctor/physician
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
- Dipotassium disulphate
- Dipotassium pyrosulfate
- Disulfuric acid, dipotassium salt
- Disulfuric acid, potassium salt (1:2)
- Potassium disulfate
- Potassium disulfate (K2S2O7)
- Potassium pyrosulfate
- Potassium pyrosulfate (K2S2O7)
- Potassium sulfate (K2S2O7)
- Pyrosulfuric acid, dipotassium salt
Frequently asked questions
What is dipotassium disulfate used for?
Dipotassium disulfate is primarily used as a sulfating agent in organic synthesis and as a reagent in laboratory research.
What is the chemical formula and molecular weight of dipotassium disulfate?
The formula is K2S2O7 and the molecular weight is 254.32 g/mol.
How should dipotassium disulfate be stored?
It should be stored at ambient temperature, in a dry place, away from moisture and incompatible materials.
What grade is available for dipotassium disulfate?
Molekula supplies dipotassium disulfate in reagent grade.
Can Molekula supply dipotassium disulfate in bulk?
Yes, Molekula can supply dipotassium disulfate in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a purchase of dipotassium disulfate?
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.