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EXXX · Thickeners

Generic food additive

No known risk

An ambiguous placeholder; safety unknown.

Category
Thickeners

What it is

A placeholder tag used when a food label mentions an additive but the specific code or identity cannot be determined.

How it is used in food

None — this is not a real substance. It is a placeholder entry standing in for an additive code that could not be matched to a specific compound, typically because a label was ambiguous, misprinted or unreadable.

Commonly found in
  • Ambiguous ingredient lists

Health and safety

Safety cannot be evaluated without knowing the specific additive.

No assessment is possible: risk depends entirely on the identity of the substance, its permitted use levels and the resulting exposure. The correct response to an unresolved code is to re-read the ingredient list or check the manufacturer's information, not to assume either safety or harm.

Regulatory status

RegionStatusNotes
Australia & New Zealand
FSANZ
Permitted Permitted under the FSANZ Food Standards Code.
European Union
EFSA / European Commission
Not approved Not on the EU authorised list of food additives (Annex II).
United States
FDA (Food and Drug Administration)
Permitted Authorised for food use by the FDA (often GRAS for standard additives).

Identification on labels

E-number
Exxx

Worth knowing

Additive codes are not self-describing, but the E-number ranges do carry meaning: 100s are colours, 200s preservatives, 300s antioxidants and acidity regulators, 400s thickeners, stabilisers and emulsifiers, 500s acidity regulators and anti-caking agents, 600s flavour enhancers, and 900s glazing agents and sweeteners. A code that fits none of these patterns is usually a transcription error.

Conclusion

An ambiguous placeholder; safety unknown.

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Entry last reviewed 2026-07-28.

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