Dictionary
chrome' al"um
1. Also called
ammonium chrome alum, ammonium chromic sulfate. a green, crystalline, water-soluble powder, chromium ammonium sulfate, CrNH
4(SO
4)
2·12H
2O, used chiefly as a mordant in dyeing.
2. a violet, crystalline, water-soluble powder, potassium chromium sulfate, CrK(SO
4)
2·12H
2O, used chiefly as a mordant in dyeing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.