E223: Sodium Metabisulphite
Main role: preservation and oxidation control
Also listed as: sodium metabisulfite, disodium disulphite
What is E223 (Sodium Metabisulphite)?
Sodium metabisulphite is a sulphite-family additive used in preservation and to limit unwanted browning or oxidation. In a food system its role relates to sulfur dioxide chemistry. It is different from a sulfate salt, even though the names may look similar.
What does it do in food?
Its main role is preservation and oxidation control. Preservation is one part of a food safety system. Recipe acidity, processing, packaging, and storage also affect how a product keeps. Follow the finished product’s storage instructions even when a preservative is listed.
Food and formulation examples
- Dried-fruit processing
- Selected potato products
- Wine and beverage preparations
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 E223, E 223, or the ingredient name. Related names and label terms include sodium metabisulfite, disodium disulphite. A family code can cover more than one specified form; check the full declaration when the distinction matters.
A fresh-looking color does not demonstrate that a food has no preservatives. Check the ingredient and allergen information because E223 can serve both preservation and color-protection roles.
Is E223 safe?
EFSA’s 2022 review identified concerns for high consumers and withdrew the temporary group intake limit. EFSA sulphites follow-up (2022).
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 E223 as Sodium metabisulphite. 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.