What is E260?
Acetic acid — the same acid that gives vinegar its sharp taste, used across the food supply as a natural preservative and acidity regulator.
E260 is acetic acid, the main component of ordinary vinegar. It's one of the oldest food additives in continuous use, produced through fermentation for thousands of years, and regulators consider it one of the lowest-concern additives that exists. Goodnessly rates it Safe.
Download our app to check additives in everyday foods
Read the FAQ →
What is acetic acid?
Acetic acid is a simple organic acid, and it's the ingredient that makes vinegar taste sharp and sour — ordinary vinegar is roughly 4–8% acetic acid dissolved in water. It's naturally produced when bacteria ferment ethanol, the same process used to make vinegar itself, and it's also one of the compounds your own body produces during normal metabolism. Food-grade acetic acid can also be made synthetically, but the end result is the same simple molecule either way.
What's it used for?
- Preservative — its acidity inhibits the growth of bacteria, yeast and mould, extending shelf life
- Acidity regulator — adjusts the tartness or pH of a wide range of foods
- Pickling — the basis of pickled vegetables, condiments and sauces
- Flavouring — contributes the characteristic sharp taste in condiments like tomato sauce and mayonnaise
Where you'll find 260 on the shelf
Acetic acid shows up anywhere a product needs a sharp, tangy edge or a longer shelf life.
Is acetic acid safe? What the research says
Acetic acid has one of the longest and cleanest safety records of any food additive — humans have consumed it as vinegar for thousands of years. Regulatory status reflects that:
| Region | Status | What this means |
|---|---|---|
| AU/NZ Australia & New Zealand (FSANZ) | Permitted, no limit | Permitted at quantum satis (as much as needed for the intended purpose), with no maximum level. |
| EU European Union (EFSA) | Permitted, no ADI | Listed as E260. No Acceptable Daily Intake has been set, since acetic acid is classified as physiologically safe. EFSA's review found no evidence of carcinogenicity or genotoxicity. |
| US United States (FDA) | GRAS | Holds Generally Recognized As Safe status, the FDA's highest confidence category. |
JECFA maintains a group ADI of "not limited" for acetic acid and its common salts, reflecting very low toxicological concern. The only real caution applies to concentrated, undiluted acetic acid (glacial acetic acid or high-strength vinegar essence), which is corrosive and can burn skin — this concerns industrial handling, not the diluted amounts used in food.
- No significant regulatory changes: acetic acid's approval status has remained stable across all major markets, reflecting its long, uncontroversial safety record. It isn't currently subject to the kind of re-evaluation debate affecting some newer synthetic additives.
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 this matters to
- People with acid reflux or heartburn, who may find vinegary or highly acidic foods worsen symptoms — a digestive comfort issue, not a food-safety one
- Anyone concerned about tooth enamel erosion from regularly consuming undiluted vinegar or very acidic foods
- Otherwise, no population group has a specific reason to avoid acetic acid at typical food-use levels
Goodnessly rates E260 Safe. It's one of the most extensively used and reviewed additives in the food supply, with a safety record stretching back thousands of years as vinegar.
How to spot it on a label
Acetic acid is usually declared clearly, since it's a well-recognised ingredient. Look out for:
- Acetic acid
- Vinegar
- 260 or E260
- "Acidity regulator (260)" in the ingredients list
Pickled products, condiments and canned goods are the most common places to find it.
Related additives
Frequently asked questions
Is E260 the same as vinegar?
Yes, essentially — 260 (or E260) is the additive code for acetic acid, the compound that makes up roughly 4–8% of ordinary vinegar and gives it its sour taste.
Is E260 natural or synthetic?
It can be either. Acetic acid occurs naturally when bacteria ferment ethanol, which is how vinegar has always been made. It can also be produced synthetically for industrial food use. Either version is the same simple molecule.
Is glacial acetic acid dangerous?
Concentrated, undiluted glacial acetic acid is corrosive and can burn skin on contact, which is why it requires careful handling in industrial settings. This doesn't apply to food, where acetic acid is always heavily diluted before use, at concentrations similar to or lower than ordinary vinegar.
Does Goodnessly rate E260 as safe, caution, or avoid?
Goodnessly rates E260 (Acetic Acid) as Safe. It has one of the longest and most extensively reviewed safety records of any food additive, with no Acceptable Daily Intake limit set by any major regulator.
Is E260 vegan and gluten-free?
Yes to both. Acetic acid is not derived from animal products, and it's naturally gluten-free.
Don't decode labels by hand
Scan any product with the Goodnessly app to instantly see its full additive breakdown, kept current as new research like this comes to light.
Download our app to check additives in everyday foods
At Goodnessly we aim to educate and empower individuals to make informed choices about everyday products.
© 2026 Goodnessly. All rights reserved.
Facebook
Instagram
X
TikTok