Molekula
Potassium persulfate
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 persulfate is a strong oxidizing agent commonly used in polymerization reactions, water treatment, and as an initiator in acrylic monomer production. It is also employed in cleaning products and as a bleaching agent. This chemical has a CAS number of 7727-21-1, with the molecular formula K2S2O8 and a molecular weight of 270.32 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a signal word of Danger. Molekula supplies potassium persulfate 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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1 kg — $147.70 per pack
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 to off white crystalline powder |
| Assay (iodometric titration) | 96.0% -104.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 5.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless, triclinic crystals |
| Odour | Odorless |
Source: PubChem CID 24412 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 64364130 |
| CAS Number | 7727-21-1 |
| IUPAC Name | dipotassium;sulfonatooxy sulfate |
| EC Number | 231-781-8 |
| Molecular Formula | K2S2O8 |
| Molecular Weight | 270.32 |
| Exact Mass | 269.8309 |
| SMILES | [O-]S(=O)(=O)OOS(=O)(=O)[O-].[K+].[K+] |
| InChIKey | USHAGKDGDHPEEY-UHFFFAOYSA-L |
| InChI | InChI=1S/2K.H2O8S2/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 | 24412 |
| UN Number | UN1492 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28334060 |
| Tariff Code | 2833400000 |
Safety & GHS
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Oxidizing
GHS03
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H272 May intensify fire; oxidizer
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H335 May cause respiratory irritation
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- 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, French, German, Italian, 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
- Anthion
- Dipotassium peroxydisulfate
- Dipotassium persulfate
- Peroxydisulfuric acid (((HO)S(O)2)2O2), dipotassium salt
- Peroxydisulfuric acid, dipotassium salt
- Potassium peroxodisulfate
- Potassium peroxydisulfate
- Potassium peroxydisulfate (K2(S2O8))
- Potassium peroxydisulphate
- potassium persulphate
Frequently asked questions
What is potassium persulfate commonly used for?
Potassium persulfate is primarily used as a radical initiator in polymerization reactions, such as in the production of polyacrylamides, as well as in chemical oxygen demand (COD) testing and as a bleaching agent.
What is the chemical formula and molecular weight of potassium persulfate?
The chemical formula is **K₂S₂O₈**, and the molecular weight is **270.32 g/mol**.
How should potassium persulfate be stored?
Store in a cool, dry place at ambient temperature, away from incompatible substances like reducing agents or organic materials.
What grades of potassium persulfate does Molekula supply?
Molekula supplies potassium persulfate in **technical/industrial grade** for polymerization and laboratory applications.
Can Molekula supply potassium persulfate in bulk quantities?
Yes, we offer bulk packaging options for potassium persulfate, including drums and bulk bags, depending on order volume.
What documentation comes with a potassium persulfate order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a packing list.
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.