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chrome alum

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chrome alum

[′krōm ′al·əm]
(inorganic chemistry)
KCr(SO4)2·12H2O An alum obtained as purple crystals and used as a mordant, in tanning, and in photography in the fixing bath. Also known as potassium chromium sulfate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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