Pickle Adulteration - Alum Adulteration in Pickles

Pickle Adulteration

Adulterant: Alum
Any form of aluminum sulfate could be called "alum," including toxic versions of the chemical. However, the type of alum you find used for pickling and in deodorant is potassium alum, KAl(SO4)2·12H2O. Sodium aluminum sulfate is a type of alum that is used in commercial baking powder.

Potassium alum has been used in pickles. The aluminum helps make the cell walls of fruits and vegetables sturdier, producing a crisp pickle or firm cherry. it is toxic in large doses. The current trend is to reduce reliance on chemicals to improve food texture. Alum may be used to soak some pickles, but it is no longer used in the final pickling solution.


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