... .free sample 3.good quality 4.best price food additive Potash Alum KAL(SO4)2.12H2O1.Specifications 2012 Potash ... fermentation, vermicelli processing, salted aquatic products, food preservative and additive.Chemical Industry: Water treatment, sizing of paper, Painting and dyeing ... used to prepare aluminum, paints, tanning, mordant, paper, waterproof agent. food additive Potash Alum KAL(SO4)2.12H2O