chrome alum

[krohm al-uhm]

noun

1. Also called ammonium chrome alum;. Also called ammonium chromic sulfate. a green, crystalline, water-soluble powder, chromium ammonium sulfate, CrNH 4 (SO4 ) 2 ⋅12H 2 O, used chiefly as a mordant in dyeing.

2. a violet, crystalline, water-soluble powder, potassium chromium sulfate, CrK(SO4 ) 2 ⋅12H 2 O, used chiefly as a mordant in dyeing.

chrome alum

noun

1. a violet-red crystalline substance, used as a mordant in dyeing. Formula: KCr(SO 4 ) 2 .12H 2 O