Sodium Metabisulphite (E223) — What You Need to Know
What Is Sodium Metabisulphite?
Sodium metabisulphite is the most widely used sulphite preservative in the food industry. It readily releases sulphur dioxide (SO2) in solution, providing potent antimicrobial and antioxidant properties. It is extensively used in winemaking, dried fruit production, and seafood processing to prevent browning and microbial spoilage.
What Is It Used For?
Used as a preservative and antioxidant in winemaking, dried fruit processing, and seafood preservation. Prevents enzymatic browning and inhibits the growth of undesirable microorganisms in a wide range of food and beverage products.
Safety Assessment
The most widely used sulphite preservative. Releases SO2 in solution, which is the active antimicrobial agent. Same sulphite sensitivity concerns — can trigger severe bronchospasm in asthmatics. EFSA 2016 re-evaluation noted that high consumers, especially children, may exceed the group ADI. Mandatory allergen labeling in EU (Annex II of Regulation 1169/2011) when exceeding 10 mg/kg or 10 mg/L as SO2.
Based on current evidence, Sodium Metabisulphite is rated Caution with a score of 5/10. This is 0.7 points below the average for preservatives (5.7/10). Last reviewed by regulators: 2016.
Commonly Found In
Always check the label for E223 or 'Sodium Metabisulphite'
▶Chemical Information
Frequently Asked Questions about Sodium Metabisulphite
Quick Facts
- E-Number
- E223
- INS Number
- 223
- Category
- Preservatives
- Origin
- Synthetic
- FDA Status
- GRAS (with labeling requirements)
- EFSA Status
- Authorized — group ADI as SO2 for all sulphites (E220–E228)
- ADI
- 0.7 mg/kg bw/day
- Last Review
- 2016
Related Additives
Other preservatives in the same family