We can supply Sodium Metabisulphite as follows: Sodium Metabisulphite (Industrial Grade) Spec.: Na2S2O5 97.5Min Iron (Fe) 0.002%Max Water Insoluble Matter : 0.02%Max Arsenic(As) 0.0001%Max
Sodium Metabisulphite (Food Grade) Spec.: Na2S2O5 97.5Min Iron (Fe) 0.002%Max Water Insoluble Matter : 0.02%Max Arsenic(As) 0.0001%Max