Definition of sulphite in English:

sulphite

(also sulfite)

noun

Chemistry
  • A salt of sulphurous acid, containing the anion SO₃²⁻.

    • ‘They breathe compounds such as CO2, sulphate, sulphite, certain oxidised metals.’
    • ‘During primary sulphate assimilation in chloroplasts, sulphate is reduced via sulphite to the organic sulphide which is used for cysteine biosynthesis.’
    • ‘Others less concerned with added sulfites can satisfy their organic cravings with wine labeled ‘made from organic grapes.’’
    • ‘Not only that, but carbonate and sulfite are the chemicals you run out of most often.’
    • ‘Sulphur dioxide is used to a certain extent in the making of virtually all wine, therefore virtually all wine contains sulfites, or sulphites.’
    • ‘Winemakers who add natural sulfites but otherwise adhere to organic standards may use the term ‘made from organically grown grapes ‘on their labels.’’
    • ‘Some asthmatics also react to sulfites present in some foods and wines.’
    • ‘As soon as you stir in the sulfite, you will see the same sort of precipitate that you see when mixing Formulary Rodinal.’
    • ‘Pesticides and added sulfites can create allergic reactions causing a person to think he is reacting to a food, when, in truth, the culprits are likely to be these additives.’
    • ‘The sulfite provides sufficient alkalinity to activate and maintain the developing process, and in addition acts as a solvent.’
    • ‘Allergies to sulfites have been documented and foods containing sulfites are usually marked.’
    • ‘Normally, sulfite oxidase metabolizes sulfites to sulfates, which are excreted in the urine or reused by the body.’
    • ‘Items to be avoided are lactose, yeast, artificial dyes, titanium dioxide preservatives, sulfites, synthetic colors, and gluten.’
    • ‘Also available are organic liquid hand soaps and shower gels, which are made without detergents, sulfites or synthetic preservatives.’
    • ‘Since last December, all products must state on the label that they contain any of the eight main food allergens (milk, eggs, peanuts, tree nuts, fish, shellfish, soy, and cereals containing gluten), plus sesame seeds and sulphites.’
    • ‘Labeling on wines otherwise organically produced, but with added sulfites, may only say, ‘made with organic grapes.’’
    • ‘Sulfate-reducing bacteria utilize a process termed ‘dissimilatory sulfate reduction’ to reduce sulfite and sulfate to sulfide.’
    • ‘What you are describing sounds suspiciously like a reaction to the preservative sulfite.’
    • ‘Californian organic wines can sometimes contain trace amounts of sulphur or sulphites.’
    • ‘Fein eliminates the bromide altogether, substitutes benzotriazole, increases the sulfite, and adds a whopping 13.5 grams of citric acid.’

Origin

Late 18th century: from French sulfite, alteration of sulfate (see sulphate).

Pronunciation

sulphite

/ˈsʌlfʌɪt/