Ammonium iron(III) sulfate dodecahydrate (NH4Fe(SO4)2•12H2O)- Crystalline introduce:
Ammonium iron(III) sulfate, NH4Fe(SO4)2·12 H2O, or NH4[Fe(H2O)6](SO4)2·6 H2O, also known as ferric ammonium sulfate (FAS) or iron alum, is a double salt in the class of alums, which consists of compounds with the general formula AB(SO4)2 · 12 H2O. It has the appearance of weakly violet, octahedrical crystals.
Molar mass:482.25 g/mol (dodecahydrate)
Appearance: Pale violet octahedral crystals
Odor: weak ammonia-like
Density: 1.71 g/cm3
Melting point:39 to 41 °C (102 to 106 °F; 312 to 314 K)
Solubility in water:1240 g/L
Ammonium iron(III) sulfate dodecahydrate is a reagent that is used as a mordant in dyeing and textile printing. It is also utilized in analytical chemistry as an iron standard. In biochemistry, ammonium ferric sulfate is used as a catalyst for the generation of free radicals. Increased xanthine oxidase and xanthine oxidoreductase activity in cultured rat cells has been demonstrated in the presence of ammonium ferric sulfate. It may be used as an iron source to restore enzymatic activity in apoenzymes, such as for soybean lipoxygenase.
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