Potassium persulfate
Persulfate salts, recognised skin and respiratory sensitisers.
- Category
- Flour treatment agents
- Vegan
- Yes
- Vegetarian
- Yes
What it is
An obscure or unapproved synthetic wax, bleach, or glazing agent, historically considered for surface treatment or dough conditioning.
How it is used in food
Historically used to extend shelf life or improve texture before modern safety evaluations.
Commonly found in- None (Banned)
Health and safety
Well-documented causes of contact dermatitis and occupational asthma in people repeatedly exposed to them.
Evaluated by food safety authorities and determined to be unsafe for general food use.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Not approved | Not approved for general food use or historically banned due to safety concerns. |
| European Union EFSA / European Commission |
Not approved | Not on the EU authorised list of food additives (Annex II). |
| United States FDA (Food and Drug Administration) |
Not approved | Not approved for general food use or historically banned due to safety concerns. |
Identification on labels
- E-number
- E922
Worth knowing
This substance is part of a large list of chemicals that were either evaluated and rejected, or historically used before modern safety regulations existed.
Conclusion
A highly toxic, banned bleaching agent.
References
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Open the appEntry last reviewed 2026-08-05.
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