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E-number E290 · Preservatives
Carbon dioxide
Halal
- Typical source
- Gas
- Plain-language explanation
- E290, or carbon dioxide, is a colorless gas used to carbonate drinks and preserve food by displacing oxygen. It is naturally present in the air we breathe and is also produced during fermentation or from industrial processes. Carbon dioxide is considered universally halal by all major certification bodies because it is a simple inorganic gas, not derived from animal or alcoholic sources.