Carbon Dioxide

PreservativesCAS: 124-38-9

This is what the ingredient is.

Carbon dioxide is a colorless gas used for carbonation, modified atmosphere packaging, and as a propellant.

Here is why it shows up on the label.

Creates fizz in carbonated beverages. Used in modified atmosphere packaging to extend shelf life. Cryogenic freezing.

Here is what food agencies say.

The FDA lists it as Generally Recognized as Safe. European food agencies allow it (E290). It is permitted in many countries worldwide.

Here is what research has found.

Natural atmospheric component. Safe at all food-use levels. Essential for carbonated beverages.

Here are a few things worth knowing.

Generally safe. Carbonated beverages may cause bloating or aggravate acid reflux in sensitive individuals.

Sources

  • FDA CFR 21
  • EFSA Panel
  • Beverage Industry Standards

How to read this page

We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.

v1.0Updated 9/12/2026