E948: Oxygen
Main role: packaging atmosphere
Also listed as: O2, oxygen gas
What is E948 (Oxygen)?
Oxygen can be part of a controlled food packaging atmosphere chosen for the specific product. Gas mixtures balance several goals, including appearance and the behavior of the packaged 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 fresh-food packs
- Specified 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 E948, E 948, or the ingredient name. Related names and label terms include O2, oxygen gas. A family code can cover more than one specified form; check the full declaration when the distinction matters.
More oxygen is not automatically better preservation. The appropriate mixture depends on the product, and it does not replace chilled storage or use-by instructions.
Is E948 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 E948 as Oxygen. 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.