sodium pyrosulfite in British English
(ˈsəʊdɪəm ˌpaɪrəʊˈsʌlfaɪt)
noun another name for sodium metabisulphite
sodium metabisulphite in British English
(ˈsəʊdɪəm ˌmɛtəbaɪˈsʌlfaɪt) or sodium pyrosulfite
noun chemistry an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
In some lamb burgers, poor quality mutton is mixed with the preservative sodium metabisulphite.