Description
Sodium Metabisulphite – Preservative & Antioxidant (E223)
Sodium Metabisulphite (Na₂S₂O₅) is commonly used in the food and beverage industry to prevent spoilage, oxidation, and microbial growth. It is especially effective in products where colour retention, freshness, and shelf life are critical.
When dissolved in water, it releases sulphur dioxide (SO₂), which is responsible for its antioxidant and antimicrobial action.
Product Specifications
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Product Name: Sodium Metabisulphite
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E-Number: E223
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Chemical Formula: Na₂S₂O₅
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Form: Crystalline powder
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Appearance: White to slightly yellow powder
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Solubility: Soluble in water
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Grade: Food-grade (as specified)
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Packaging: 25kg bag
Uses in Food & Beverage Processing
Preservative & Antioxidant
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Prevents oxidation and enzymatic browning
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Maintains colour and freshness in food products
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Extends shelf life
Antimicrobial Agent
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Inhibits the growth of bacteria, yeasts, and moulds
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Widely used in winemaking and brewing to control fermentation
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Commonly used as a sterilising agent in beverage production
Food Processing Applications
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Dried fruits (apricots, raisins)
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Fruit juices and concentrates
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Seafood and fish processing
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Potato products
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Candies and baked goods (controlled use)
Water Treatment
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Neutralises chlorine in water
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Used in brewing and food processing where chlorine-free water is required
How Sodium Metabisulphite Works
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Releases sulphur dioxide (SO₂) when dissolved
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SO₂ prevents oxidation and microbial activity
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Helps stabilise colour, flavour, and product quality
Safety & Handling Considerations
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Must be used at very low concentrations (ppm levels)
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Excessive use may affect taste and aroma
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Sulphites may cause sensitivity reactions in certain individuals, including asthmatics
Handling Guidelines
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Avoid inhalation of dust
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Use appropriate protective equipment
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Store in a cool, dry place
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Follow regulated food-grade usage levels
Safety Data Sheet (SDS) available upon request.
Packaging & Supply
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Supplied in 25kg bags
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Suitable for food manufacturers, beverage producers, and industrial users
Available for delivery in:
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Johannesburg
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Pretoria
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Cape Town
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Durban
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Port Elizabeth
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Nationwide South Africa
Bulk and wholesale supply options available on request.
Why Buy Sodium Metabisulphite from Bidchem?
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Food-grade quality (E223)
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Reliable 25kg bulk packaging
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Suitable for food, beverage, and water treatment applications
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Nationwide delivery across South Africa
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Trusted chemical supplier based in Johannesburg

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