E938: Argon
Main role: packaging atmosphere
Also listed as: Ar, argon gas
What is E938 (Argon)?
Argon is an inert gas used in suitable food packaging atmospheres. It can replace some air in a package to help manage oxygen exposure without being a preservative dissolved into every part of the food.
What does it do in food?
Its main role is packaging atmosphere. Gas mixtures are chosen for a particular product and package. A protective atmosphere supports a storage system; it does not replace temperature control, hygiene, or the instructions printed on the pack.
Food and formulation examples
- Modified-atmosphere packaging
- Specialized beverage protection
- Food gas mixtures
These examples describe formulation roles, not a list of unrestricted legal uses. Availability and permitted applications differ by country and food category.
Label names and ingredient questions
Look for E938, E 938, or the ingredient name. Related names and label terms include Ar, argon gas. A family code can cover more than one specified form; check the full declaration when the distinction matters.
A protective atmosphere does not make a package shelf-stable indefinitely. Follow the storage temperature, opening instructions, and use-by date on the actual product.
Is E938 safe?
There is no meaningful personal risk estimate from an E number alone. Food-grade specifications, allowed uses, amount consumed, and individual circumstances all matter. The authorization record below gives the legal scope; it is not a claim that every possible use is appropriate.
A label identifies the ingredient but usually not its concentration. Calculating daily intake requires the amount in the food and the quantities eaten.
Authorization and conditions of use
The Great Britain food additive register lists E938 as Argon. This is an entry subject to its stated conditions, not unrestricted permission for every food. The record links to the applicable authorization terms. For an EU product, use the European Commission food additive database to check the relevant food category and limits. Other countries may use different names or rules.