FERROUS AMMONIUM SULFATE supplier, Physically it can be identified as light green crystalline solid. Application: It is used in medicine, chemical analysis and metallurgy. Ferrous Ammonium Sulfate Hexahydrate ( Crystalline). Also know as Ammonium iron(II) sulfate, or Mohr’s salt, is the inorganic compound with the formula (NH₄)₂Fe(SO₄)₂·6H₂O.Dose: Formula Weight: 392.14 Linear Formula: Fe(NH4)2(SO4)2·6H2O Molecular Formula: H8FeN2O8S2 · 6 H2O Assay Percent Range: 98.5 to 101.5 %Note: Soluble in water that forms weakly acidic solutions. Deliquesces in air.