Sodium acetate
The sodium salt of vinegar, used to control acidity and add a mild tangy flavour in breads, snacks and condiments.
What is it?
Sodium acetate is the sodium salt of acetic acid (the acid in vinegar). It occurs naturally in small amounts in fermented foods and is produced commercially by reacting acetic acid with sodium carbonate or sodium hydroxide. It comes as a white crystalline powder with a faint vinegar-like smell.
What does it do?
It lowers and stabilises the pH of a food product, inhibiting the growth of moulds and bacteria and extending shelf life. Because it is the salt of a weak acid, it also acts as a pH buffer, resisting sharp acidity swings during processing. In flavoured snacks it contributes the characteristic 'salt and vinegar' tang.
Where you will see it
Most commonly found in par-baked and packaged breads (to retard mould), salt-and-vinegar flavoured crisps and snacks, ready-made condiments, pickled products, and some ready meals. On UK ingredient labels it appears as either 'sodium acetate' or 'E262'.
What the science says
How the body handles it
Once ingested, sodium acetate breaks down into sodium ions and acetate. Acetate is a normal metabolic intermediate produced in the body during digestion of fats and fermentation in the gut. It is oxidised for energy through ordinary metabolic pathways. There is no accumulation or unusual processing required.
Acetate derived from acetic acid is a normal endogenous metabolite; EFSA's Panel on Food Additives and Nutrient Sources concluded that sodium acetate does not raise a safety concern at the levels used in food and set no numerical ADI.
Sodium content
Like any sodium salt, sodium acetate contributes sodium to the diet. For people managing sodium intake for blood pressure or kidney health, all sodium-containing additives collectively add to total daily sodium load. The amounts from E262 at typical use levels are small but not zero.
UK dietary surveys consistently show that bread and bakery products are the largest single source of dietary sodium for UK adults, partly because of sodium-containing additives and sodium chloride used in their manufacture.
Where it stands with the regulators
Who should be careful
People on a medically supervised low-sodium diet should note that sodium acetate adds to total dietary sodium. Look for 'sodium acetate' or 'E262' in the ingredients list alongside the sodium content in the nutrition panel.
The honest read
Sodium acetate is one of the most chemically ordinary food additives in use: the body treats it as ordinary vinegar and ordinary salt, metabolising both through pathways that operate all day from natural food sources. No credible evidence of toxicity, carcinogenicity, endocrine disruption or other adverse effect exists at food-use levels. The only honest note concerns sodium: people actively reducing dietary sodium should factor in all sodium-containing ingredients, including this one.
Related additives
Common questions
Is E262 banned in the UK?
No. Sodium acetate is approved for use in food in both the UK and the EU under the FSA approved-additives list and assimilated EU Regulation 1333/2008.
Does E262 contain vinegar?
Not exactly. Sodium acetate is the salt of acetic acid, the same acid that makes vinegar sour. The two are chemically related and the body metabolises them the same way, but sodium acetate is a dry crystalline powder, not liquid vinegar.
What foods contain E262?
It is most commonly used in packaged bread and rolls (to slow mould growth), salt-and-vinegar crisps and snacks, condiments, pickled products, and some ready meals. Check the ingredients list for 'sodium acetate' or 'E262'.
Is E262 vegan?
Yes. Sodium acetate is derived from acetic acid and sodium compounds; no animal products are involved in its production.
Sources
- UK FSA Approved Additives and E Numbers
- EU Regulation 1333/2008 on food additives (Annex II)
- National Diet and Nutrition Survey (NDNS) Rolling Programme, Public Health England
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