sodium metabisulfite
Basic Information
| Field | Content |
|---|---|
| Chinese name | sodium metabisulfite |
| English name | sodium metabisulfite |
| INS/E number | INS 223 |
| Functional class | Preservative, Antioxidant, Bleaching agent |
| Year adopted | 1965 |
| Approved by | Australia/New Zealand (FSANZ), European Union (EFSA) |
What is it?
Sodium metabisulfite is the dehydrated dimer of sodium bisulfite; it releases sulfur dioxide in solution and is among the most commonly used sulfite preservatives.
Source
Industrial：二氧化硫与碳酸钠反应后脱水结晶制得
Why is it used?
- Effectively inhibits microbes (especially moulds and yeasts)
- Prevents oxidative browning and discolouration
- Maintains colour of seafood (e.g. shrimp)
- Used in wine as antioxidant and antimicrobial
Common Foods
- Dried fruits
- Wine
- Candied fruits
- Pickled vegetables
- Seafood such as shrimp
- Jams
Safety
ADI (Acceptable Daily Intake)：0-0.7 mg/kg bw (以 SO₂ 计)
Concerns：
- 哮喘及敏感者可能过敏
- 破坏硫胺素（维生素B1）
- 残留以 SO₂ 计需符合限量
Usage Standard
China：GB 2760《食品安全国家标准 食品添加剂使用标准》
International：
- EU Regulation 1333/2008 Annex II/III (E 223)
- FDA 21 CFR 182.3764 (Sodium metabisulfite, GRAS)
- Codex GSFA (INS 223)
- Australia New Zealand Food Standards Code (Sodium metabisulfite)
In a nutshell
Sodium metabisulfite is the most widely used sulfite preservative, potent against microbes and oxidation but requiring residue control.
Consumer Advice
Sodium metabisulfite is one of the most common sulphite additives, acting as both a preservative and an antioxidant in wine, beer, dried fruit, candied fruit, dried vegetables and shrimp to prevent browning and spoilage. It releases sulfur dioxide in the presence of moisture. It is safe for most consumers, but sulphites are a legally recognised allergen that can trigger bronchospasm in asthmatics; sensitive people should avoid such foods. Strict residue limits apply in all major jurisdictions.
Dietary Restrictions
- Vegan: ✅
- Halal: ✅
- Kosher: ✅
Allergens
⚠️ Contains allergens
Disclaimer
The information provided here is for discussion and educational purposes only. It is not medical advice or an evaluation/rating of any product or ingredient. This information may not apply to you; before using or taking any action, you should contact the manufacturer, vendor, medical, dietary, fitness, or other professionals. If you use any information provided here, you do so at your own risk.