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Food additives data book - wordpres

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Preservatives 776<br />

NAME: Sodium bisulphite<br />

CATEGORY: Antimicrobial preservative<br />

FOOD USE: Preservative. Not for use on meats, sources of vitamin B 1, raw fruits and vegetables, or fresh potatoes<br />

SYNONYMS: CAS 7631-90-5/ EINECS 231-548-0/ E222 sodium acid sulfite/ Acid sodium sulfite/ Sodium bisulfite<br />

(1:1)/ Sulfurous acid monosodium salt/ Sodium hydrogen sulfite/ Sodium sulfhydrate<br />

FORMULA: Na HSO3 (commercially sodium bisulphite consists mainly of sodium metabisulfite Na2S2O5 with<br />

sodium bisulphite)<br />

MOLECULAR MASS: 104.06<br />

ALTERNATIVE FORMS: Sodium sulphite, sulphur dioxide, sodium metabisulphite, potassium metabisulphite, calcium sulphite,<br />

calcium bisulphite<br />

PROPERTIES AND APPEARANCE: White crystalline powder, SO 2 odour, disagreeable taste<br />

MELTING RANGE IN °C: 315<br />

DENSITY AT 20°C (AND OTHER 1.48<br />

TEMPERATURES) IN g/l:<br />

PURITY %: 61.6 (as sulphur dioxide)<br />

HEAVY METAL CONTENT MAXIMUM IN 10 (as Pb)<br />

ppm:<br />

SOLUBILITY % AT VARIOUS TEMPERATURE/pH COMBINATIONS:<br />

in water: @ 20°C 300% @ 50°C Very soluble @ 100°C Very soluble<br />

FUNCTION IN FOODS: Antimicrobial preservative, antioxidant and bleach<br />

ALTERNATIVES: Combination of antimicrobial preservative, antioxidant and bleach

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