Where to use sodium benzoate and potassium metabisulphate as preservatives in food preparations?
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Other Answers (3)Rated Highest
One has potassium and the other has sodium! They are both salts of benzoic acid.
But really, the two are the same in terms of their functionality -- they are both the conjugate base of benzoic acid. If you are simply making a buffer solution with benzoic acid and a benzoate salt, it makes no difference. However, if being used for human consumption, there is a difference between potassium and sodium.
For more, see the Wikipedia links to the left of this answer.
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This is simple! use them on chicken. hope this helps!