What is E261?
Potassium acetate and potassium diacetate (E261) are acidity regulators and related food ingredients used in selected applications. Goodnessly rates E261 Caution as a prompt to notice salts and formulation context.
E261 refers to potassium acetates, including potassium acetate and potassium diacetate. They can help manage acidity and may have flavour or preservation-supporting functions in specified products.
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What is Potassium acetate or Potassium diacetate?
E261 refers to potassium acetates, including potassium acetate and potassium diacetate. They can help manage acidity and may have flavour or preservation-supporting functions in specified products.
What's it used for?
- Adjusting acidity
- Supporting flavour balance
- Helping control formulation conditions
- Serving as a source of acetate in selected uses
Where you'll find E261 on the shelf
Where authorised, it is most relevant to sauces, prepared foods, bakery products and specialised formulations.
Is E261 safe? What the regulators say
The three systems use different legal descriptions for E261: the exact function, food category and applicable specification determine the permission.
| Region | Status | What this means |
|---|---|---|
| AU/NZ Australia & New Zealand (FSANZ) | Permitted with conditions | FSANZ lists potassium acetate or potassium diacetate as additive 261 in Schedule 15. Food-category conditions apply. |
| EU European Union (EFSA) | Authorised with conditions | E261 potassium acetates are included in the EU Union list, with category conditions and quantum satis provisions where applicable. |
| US United States (FDA) | Permitted for specified uses | FDA substance records and 21 CFR 172.515 provide a US food-use basis for potassium acetate as a flavouring substance or adjuvant; this is not the same as a blanket Part 184 GRAS entry. |
Goodnessly rates E261 Caution to encourage label awareness around potassium salts and acidity regulators. It is not a claim that authorised E261 use causes harm.
- FSANZ additive-numbering and Schedule 15 material covers E261.
- EU Regulation (EU) No 1129/2011 lists E261 potassium acetate.
- FDA food-substance records and 21 CFR 172.515 cover potassium acetate as a flavouring substance or adjuvant.
This section is checked periodically rather than continuously — if you're reading this well after the date above, it's worth confirming nothing has changed before citing it.
Who might want to limit or avoid it
- People who prefer simpler acidity-regulator systems
- People comparing sauces and prepared foods
- People following professional advice about potassium intake
The amount and purpose of the additive depend on the food category, so the full label and serving pattern provide useful context.
How to spot it on a label
Look for:
- Potassium acetate
- Potassium diacetate
- 261 or E261
- Acidity regulator (261)
Look for potassium acetate, potassium diacetate or the acidity-regulator class followed by the number.
Related additives
Frequently asked questions
What is E261?
E261 refers to potassium acetate and potassium diacetate, acidity-regulating potassium salts used in selected foods.
Is E261 permitted?
E261 is permitted with conditions in Australia/New Zealand and the EU. In the US, potassium acetate has a specified flavouring or adjuvant pathway rather than a blanket Part 184 GRAS listing.
Why is E261 rated Caution?
Goodnessly uses Caution as a prompt to notice acidity regulators and potassium-salt context.
How does Goodnessly rate E261?
Goodnessly rates E261 (potassium acetate or potassium diacetate) as Caution.
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