potassium sulfite
Basic Information
| Field | Content |
|---|---|
| Chinese name | potassium sulfite |
| English name | potassium sulfite |
| INS/E number | INS 225 |
| Functional class | Preservative, Antioxidant |
| Year adopted | 1965 |
| Approved by | Australia/New Zealand (FSANZ) |
What is it?
Potassium sulfite is the potassium salt of sulfur dioxide; it releases sulfite in solution and is used as a preservative and antioxidant.
Source
Industrial：二氧化硫气体与氢氧化钾溶液中和反应制得
Why is it used?
- Inhibits microbial growth
- Prevents oxidative browning and discolouration
- Acts as a bleaching agent in processing
- Maintains quality of fruit and vegetable products
Common Foods
- Dried fruits
- Wine
- Candied fruits
- Pickled vegetables
- 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）
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 225)
- FDA 21 CFR 182.3640 (Potassium sulfite, GRAS)
- Codex GSFA (INS 225)
- Australia New Zealand Food Standards Code (Potassium sulfite)
In a nutshell
Potassium sulfite is a potassium sulfite preservative used for antimicrobial, antioxidant and bleaching purposes.
Consumer Advice
Potassium sulfite is a sulphite preservative and antioxidant similar to potassium metabisulfite, used in dried fruit, wine and pickled foods to prevent browning and spoilage. It releases sulfur dioxide in the presence of water or acid. It is safe for most people, but sulphites are a recognised allergen that can trigger reactions in asthmatics and other sensitive individuals, so labelling is mandatory above certain levels. Sensitive people should check labels and avoid such foods.
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.