Potassium sulphates
A safe, functional salt substitute and acidity regulator.
- Category
- Acidity regulators
- Vegan
- Yes
- Vegetarian
- Yes
What it is
A potassium salt used as an acidity regulator and salt substitute.
How it is used in food
Serves as an acidity regulator, carrier and sodium-free salt substitute, allowing manufacturers to lower the sodium content of foods while contributing dietary potassium.
Commonly found in- Low-sodium products
- Beverages
- Dietary supplements
Health and safety
Safe for consumption and provides a dietary source of potassium.
JECFA assigned sulphates an ADI 'not specified', its least restrictive category, reflecting very low toxicity. Both potassium and sulphate are normal dietary constituents; the main caution in the literature concerns people with impaired kidney function, who must manage overall potassium intake.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Permitted | Permitted under the FSANZ Food Standards Code. |
| European Union EFSA / European Commission |
Permitted | Authorised for food use under EU regulations (Annex II). |
| United States FDA (Food and Drug Administration) |
Permitted | Authorised for food use by the FDA (often GRAS for standard additives). |
Identification on labels
- E-number
- E515
Also printed asPotassium sulfates
Worth knowing
Potassium sulphate occurs naturally as the mineral arcanite, and the vast majority of world production goes not into food but into premium fertiliser for chloride-sensitive crops like fruit and tobacco.
Conclusion
A safe, functional salt substitute and acidity regulator.
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Open the appEntry last reviewed 2026-07-28.
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