Alum: Culinary uses

bulk alum

Alum
http://en.wikipedia.org/wiki/Alum

Alum is both a specific chemical compound and a class of chemical compounds.
The specific compound is the hydrated potassium aluminium sulfate (potassium alum) with the formula KAl(SO4)2·12H2O.

Uses: Culinary

  • Alum powder, found in the spice section of many grocery stores, may be used in pickling recipes as a preservative to maintain fruit and vegetable crispness.
  • Alum is used as the acidic component of some commercial baking powders.

related:
https://franzcalvo.wordpress.com/2013/12/26/aluminum-alzheimers-disease