About This Product
Sodium sulfite, formula Na2SO3, carries CAS number 7757-83-7 and the European additive number E221. The anhydrous grade is a white, free-flowing powder, soluble in water, giving a mildly alkaline solution. Like the other sulphiting agents it functions by providing sulphite and sulphur dioxide in solution.
It is the least acidic of the common sulphiting agents, and that is the basis for choosing it. Sodium metabisulfite releases SO2 readily and drives pH down, which suits acidic products such as wine and fruit juice but can be disruptive in a neutral or alkaline system. Sodium sulfite delivers comparable antioxidant and anti-browning protection while leaving pH essentially undisturbed, so it is used where acidification would damage the product. Its action is the same in kind: it reduces oxygen, inhibits the polyphenol oxidase responsible for enzymatic browning in cut fruit and vegetables, blocks Maillard browning by binding carbonyl groups, and suppresses wild yeasts and moulds. The allergen requirement is identical to that for all sulphites, with declaration required above 10 mg/kg expressed as SO2, and it is not permitted on foods regarded as a significant source of vitamin B1, which it destroys.
It is used in potato and vegetable processing, dried fruit, sugar refining, brewing, and as a processing and antioxidant aid.
Bio Green Foods supplies food-grade sodium sulfite to specification on assay, SO2 content, iron, selenium, arsenic and heavy metals.
Specifications
Applications
Supply notes
- Grade
- Our team confirms this with your quotation.
Indicative price: $1.00–8.50/kg
Indicative bulk guide only. Prices are market-linked and updated regularly - please request a quote for current pricing and volume rates.
Start with the recipe and the market
- Finished food, target function and process conditions
- Required grade, physical form and critical limits
- Destination market and permitted-use requirements
- Quantity, packaging and delivery destination
Confirm the evidence before ordering
Food-grade identity alone does not establish permission for every food or country. Confirm permitted use, limits and labelling requirements for the intended market. Certification availability must be checked for the nominated product and manufacturing site.
Product illustrations show representative material and packaging. The quotation confirms the actual source, grade, pack size and labelling.
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