Sodium metabisulphite, also known as sodium pyrosulfite, sodium disulfite, disodium disulfite, edible sodium metabisulfite, or sodium metabisulfite, is a commonly used food additive.
Applications:
Common foods that may contain sodium metabisulphite include (but are not limited to):
(1) Vegetable products: such as bamboo shoots, mushrooms, and canned mushrooms.
(2) Starch products: such as vermicelli (glass noodles) and starch noodles.
(3) Dried fruits and preserved fruits: such as candied fruits (preserved fruits).
(4) Dried vegetables, pickled vegetables: such as chopped chili peppers and pickled Chinese onion heads.
(5) Dried bean curd sheets: such as dried bean curd sticks (fuzhu) and bean curd skin (yuba).
(6) Starch sugars: such as fructose, glucose, maltose syrup, and partially inverted sugars.
Functions:
(1) Bleaching Agent: Used for bleaching certain foods, such as white sugar and some starch products, by removing pigments to improve appearance and quality.
(2) Preservative: Inhibits the growth of bacteria, yeast, and mold by releasing sulfur dioxide, thereby preventing food spoilage.
(3) Leavening Agent: Reacts with acidic substances in dough to produce carbon dioxide gas, causing leavening.
(4) Color Retention Agent (Color Fixative): Used in some processed meats and dried fruits to maintain a vibrant appearance.
(5) Preservative/Freshness Agent: Helps maintain food freshness by inhibiting enzyme activity and microbial growth.
Usage Limits:
(1) European Union (EU):
The EU has strict regulations regarding the specific usage levels and residue limits for food additives, including sodium metabisulphite.
(2) United States (US):
The FDA (Food and Drug Administration) regulates the usage limits of sodium metabisulphite in different foods.
(3) China:
According to the National Food Safety Standard Standard for Use of Food Additives (GB2760-2014), some maximum usage limits are stipulated as follows (expressed as residual sulfur dioxide):
①Fresh, surface-treated fruits: Max. 0.05 g/kg
②Dried fruits: Max. 0.1 g/kg
③Candied fruits and dried fruit snacks (preserved fruits): Max. 0.35 g/kg
④Dried bean curd sheets (including dried bean curd sticks, bean curd skin, etc.): Max. 0.2 g/kg
Health Impacts:
(1) Gastrointestinal Symptoms: High-dose intake may cause gastrointestinal discomfort, such as abdominal pain, nausea, and vomiting.
(2) Allergic Reactions: Sodium metabisulfite may cause allergic reactions in some individuals, such as adverse reactions in asthma patients; excessive consumption may also cause varying degrees of damage to the brain and other tissues.
(3) Nutritional Impact: Long-term high-dose intake may interfere with the absorption of Vitamin B1 (Thiamine).
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Post time: Aug-08-2025