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WordReference Random House Unabridged Dictionary of American English © 2024chrome′ al′um, - ChemistryAlso called ammonium chrome alum, ammonium chromic sulfate. a green, crystalline, water-soluble powder, chromium ammonium sulfate, CrNH4(SO4)2·12H2O, used chiefly as a mordant in dyeing.
- Chemistrya violet, crystalline, water-soluble powder, potassium chromium sulfate, CrK(SO4)2·12H2O, used chiefly as a mordant in dyeing.
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