Iron(II) nitrate

Iron(II) nitrate is the nitrate salt of iron(II). It is commonly encountered as the green hexahydrate, Fe(NO3)2·6H2O, which is a metal aquo complex, however it is not commercially available unlike iron(III) nitrate due to its instability to air. The salt is soluble in water serves as a ready source of ferrous ions.

Iron(II) nitrate
Names
Other names
  • Ferrous nitrate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 233-899-5
PubChem CID
UNII
  • Key: MVFCKEFYUDZOCX-UHFFFAOYSA-N
  • InChI=1S/Fe.2NO3/c;2*2-1(3)4/q+2;2*-1
  • hexahydrate: InChI=1S/Fe.2NO3.6H2O/c;2*2-1(3)4;;;;;;/h;;;6*1H2/q+2;2*-1;;;;;;
    Key: SUOTZEJYYPISIE-UHFFFAOYSA-N
  • nonahydrate: InChI=1S/Fe.2NO3.9H2O/c;2*2-1(3)4;;;;;;;;;/h;;;9*1H2/q+2;2*-1;;;;;;;;;
    Key: QZRHHEURPZONJU-UHFFFAOYSA-N
SMILES
  • [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Fe+2]
  • hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Fe+2]
  • nonahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.O.O.O.[Fe+2]
Properties
Fe(NO3)2
Molar mass 179.86 g/mol
Appearance Green crystals (hexahydrate)
Melting point 60 °C (140 °F; 333 K) (hexahydrate)
Boiling point 61 °C (142 °F; 334 K) (decomposes)
87.525 g/100 mL
Structure
Orthorhombic
Thermochemistry
Std enthalpy of
formation (ΔfH⦵298)
 -497.9 kJ/mol
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 428 mg/kg (subcutaneous, rabbit)
Related compounds
Other anions
 Iron(II) phosphate
Other cations
 Manganese(II) nitrate
Cobalt(II) nitrate
Related compounds
 Iron(III) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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