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E260 Acetic Acid – Effects, Uses and Safety

E260 is the EU approval number for acetic acid, a naturally occurring substance used as a preservative and acidity regulator in food products.

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Things worth knowing about "E260"

E260 is the EU approval number for acetic acid, a naturally occurring substance used as a preservative and acidity regulator in food products.

What is E260 (Acetic Acid)?

E260 refers to acetic acid (chemical formula: CH₃COOH), an organic acid approved as a food additive in the European Union. Acetic acid is the main component of household vinegar and is responsible for its characteristic sour taste and pungent smell. In its concentrated form, it is a colorless liquid with a sharp, distinctive odor.

Origin and Production

Acetic acid occurs naturally and is produced, among other ways, during the fermentation of sugars by acetic acid bacteria (genus Acetobacter). For industrial production, it is mainly manufactured through chemical synthesis (e.g., methanol carbonylation) or microbial fermentation. Household vinegar typically contains 5–8% acetic acid, while concentrated acetic acid (glacial acetic acid) has a purity of over 99%.

Use in Food

As the food additive E260, acetic acid is used for several purposes:

Preservative: Its low pH inhibits the growth of bacteria, yeasts, and molds, thereby extending the shelf life of food products.
Acidity regulator: It controls the acidity (pH level) of food, improving taste and texture.
Flavoring agent: It contributes to the characteristic sour taste of products such as mustard, mayonnaise, pickles, marinades, and baked goods.

E260 is found in a wide variety of products, including pickled vegetables, sauces, dressings, bread, and delicatessen items.

Safety and Tolerability

Acetic acid is considered safe by the European Food Safety Authority (EFSA) when used in approved quantities. It is a natural component of human metabolism and is completely broken down by the body. In sensitive individuals, high consumption of strongly acidic products may lead to:

Irritation of the oral mucosa and gastrointestinal tract
Heartburn or acid reflux
Dental enamel erosion with frequent contact with concentrated acetic acid

At concentrations typically found in food products, E260 is considered safe for the vast majority of the population. No specific ADI (Acceptable Daily Intake) value has been established, as acetic acid is classified as physiologically safe.

Regulatory Status

In the EU, E260 is approved under Regulation (EC) No 1333/2008 on food additives. Its use is regulated in specific food categories with defined maximum levels. In many cases, the principle of quantum satis applies, meaning it may be used in the minimum quantity necessary without an explicit numerical limit. E260 must be listed in the ingredients of food products either as E260 or as acetic acid.

References

European Food Safety Authority (EFSA): Re-evaluation of acetic acid (E 260), sodium acetates (E 262i, ii), potassium acetates (E 261i, ii) and calcium acetate (E 263) as food additives. EFSA Journal, 2017.
European Commission: Regulation (EC) No 1333/2008 of the European Parliament and of the Council on food additives. Official Journal of the European Union, 2008.
Fennema, O.R. (ed.): Food Chemistry. Marcel Dekker, 3rd edition, 1996.

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