Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Chrome alum or Chromium(III) potassium sulfate is the potassium double sulfate of chromium. Its chemical formula is KCr(SO4)2 and it is commonly found in its dodecahydrate form as KCr(SO4)2·12 (H2O). It was formerly used in leather tanning.

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