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An E-number identifies an additive substance; it does not tell you what job that additive performs in a particular food. To tell whether an additive is being used as a preservative, look for the function named on the food label, then check the substance and its authorised use in the European Commission’s database.
What does an E-number mean?
An E-number is an identification code for a food-additive substance. It is not a functional label: the code alone does not say whether the additive is acting as a preservative, colour, antioxidant, or something else in the food.
EU labelling rules require the label to identify both the additive’s function in the finished food and the specific substance, using its name or E-number. EFSA gives the example “colour or preservative” for the function and “E 415 or Xanthan gum” for the substance. EFSA’s food-additives overview explains this distinction.
How can you tell whether an additive is a preservative?
- Read the function on the label. Look for “preservative” alongside the additive name or E-number.
- Identify the substance. Note its E-number or name so you can distinguish it from other additives.
- Check the authorised use if you need more detail. Search the European Commission’s food-additives database for the substance and its food category or conditions of use. The database is based on the Union list in Annex II to Regulation (EC) No 1333/2008.
A code’s presence in an inventory does not establish the function it serves in a particular product. The label’s stated function and the substance’s authorised use answer different parts of the question.
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What makes a preservative different from an antioxidant?
A preservative prolongs shelf life by protecting food against microorganisms. An antioxidant also helps prolong shelf life, but protects food against oxidation. The European Commission lists these as separate technological functions, alongside others such as colouring and flour treatment. The Commission’s additives overview describes the distinction.
That is why “extends shelf life” is not enough to classify an additive as a preservative: the mechanism and stated function matter.
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Why a list of E-numbers cannot classify preservatives by itself
A database or taxonomy that recognises many E-numbers may still be unable to identify preservatives if it records only substance identity. An E-number answers “which additive substance?”; the function answers “what is it doing in this food?” EU rules define multiple technological purposes, and the same broad category of “food additive” includes substances used for different jobs.
When comparing two additives, consider the function in the food, the substance identity, the relevant food category and conditions of use, and whether the use is currently authorised. Similar codes or the shared label “additive” do not prove that two substances do the same job.
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Are all E-numbered substances automatically permitted in every food?
No. An additive must be authorised and listed with conditions of use; authorisation is not blanket permission for every food or amount. The Commission says approval depends on a safety assessment, technological need, and the need to avoid misleading consumers. Annex I to Regulation (EC) No 1333/2008 covers technological functions, while Annex II contains the Union list for use in foods. See the Commission’s EU rules for food additives.
EFSA provides scientific assessments and advice. The European Commission and Member States make decisions on approval and conditions, including labelling and maximum permitted limits. Because authorised uses can change, use the Commission’s live database to check a particular additive and food category rather than relying on an undated list.
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What does the claim “629 E-numbers” establish?
It does not, on its own, establish how many additives are currently authorised in the EU. EFSA’s page, reviewed on 13 April 2026, says more than 300 substances are authorised for use as food additives in the EU. It separately reports that 315 additives approved before 20 January 2009 were included in the re-evaluation programme, and that more than 70% of that historical cohort had been re-evaluated. These figures have different scopes; neither verifies 629 as a current authorised-additive count.
To assess a count such as 629, a reader would need its source, date, geography, and counting method—for example, whether it counts substances, codes, entries, or other categories. Without that provenance, treat 629 as an unverified count, not an official current total.
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