ferric ammonium sulfate

ferric ammonium sulfate

[′fer·ik ə′mōn·ē·əm ′səl‚fāt] (inorganic chemistry) FeNH4(SO4)2·12H2O Efflorescent, water-soluble crystals; used in medicine, in analytical chemistry, and as a mordant in textile dyeing. Also known as ferric ammonium alum; iron ammonium sulfate.