Iron(III) nitrate

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Iron(III) nitrate
Identifiers
CAS number10421-48-4 YesY
13476-08-9 (hexahydrate)
7782-61-8 (nonahydrate)
PubChem168014
ChemSpider10670706 YesY
UNIIN8H8402XOB YesY
RTECS numberNO7175000
Jmol-3D imagesImage 1
Properties
Molecular formulaFe(NO3)3
Molar mass241.86 g/mol (anhydrous)
403.999 g/mol (nonahydrate)
AppearancePale violet crystals
hygroscopic
Density1.68 g/cm3 (hexahydrate)
1.6429 g/cm3(nonahydrate)
Melting point

47.2 °C (nonahydrate)

Boiling point

125 °C (nonahydrate)

Solubility in water150 g/100 mL (hexahydrate)
Solubilitysoluble in alcohol, acetone
Structure
Coordination
geometry
octahedral
Hazards[1]
GHS pictogramsOx. sol. 3Acute tox. 4 (oral); Eye irrit. 1
GHS signal wordWARNING
GHS hazard statementsH272, H302, H319
GHS precautionary statementsP210, P220, P221, P264, P270, P280, P301+312, P305+351+338, P330, P337+313, P370+378, P501
EU Indexnot listed
NFPA 704
NFPA 704.svg
0
1
0
OX
Flash pointnon-flammable
Related compounds
Related compoundsIron(III) chloride
Iron(III) sulfate
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references
 
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Iron(III) nitrate
Identifiers
CAS number10421-48-4 YesY
13476-08-9 (hexahydrate)
7782-61-8 (nonahydrate)
PubChem168014
ChemSpider10670706 YesY
UNIIN8H8402XOB YesY
RTECS numberNO7175000
Jmol-3D imagesImage 1
Properties
Molecular formulaFe(NO3)3
Molar mass241.86 g/mol (anhydrous)
403.999 g/mol (nonahydrate)
AppearancePale violet crystals
hygroscopic
Density1.68 g/cm3 (hexahydrate)
1.6429 g/cm3(nonahydrate)
Melting point

47.2 °C (nonahydrate)

Boiling point

125 °C (nonahydrate)

Solubility in water150 g/100 mL (hexahydrate)
Solubilitysoluble in alcohol, acetone
Structure
Coordination
geometry
octahedral
Hazards[1]
GHS pictogramsOx. sol. 3Acute tox. 4 (oral); Eye irrit. 1
GHS signal wordWARNING
GHS hazard statementsH272, H302, H319
GHS precautionary statementsP210, P220, P221, P264, P270, P280, P301+312, P305+351+338, P330, P337+313, P370+378, P501
EU Indexnot listed
NFPA 704
NFPA 704.svg
0
1
0
OX
Flash pointnon-flammable
Related compounds
Related compoundsIron(III) chloride
Iron(III) sulfate
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Iron(III) nitrate, or ferric nitrate, is the chemical compound with the formula Fe(NO3)3. Since it is deliquescent, it is commonly found in its nonahydrate form Fe(NO3)3·9H2O in which it forms colourless to pale violet crystals.

Preparation[edit]

The compound is prepared by treating iron metal powder with nitric acid.

2 Fe + 8 HNO3 = 2 Fe(NO3)3 + 2 NO + 4 H2O.

Applications[edit]

In the chemical laboratory[edit]

Ferric nitrate is the catalyst of choice for the synthesis of sodium amide from a solution of sodium in ammonia:[2]

2 NH3 + 2 Na → 2 NaNH2 + H2

Certain clays impregnated with ferric nitrate have been shown to be useful oxidants in organic synthesis. For example, ferric nitrate on Montmorillonite—a reagent called "Clayfen"—has been employed for the oxidation of alcohols to aldehydes and thiols to disulfides.[3]

Other applications[edit]

Ferric nitrate solutions are used by jewelers and metalsmiths to etch silver and silver alloys.

References[edit]

  1. ^ HSNO Chemical Classification Information Database, New Zealand Environmental Risk Management Authority, retrieved 2010-09-19 .
  2. ^ Hampton, K. G. Harris, T. M.; Hauser, C. R. (1973), "2,4-Nonanedione", Org. Synth. ; Coll. Vol. 5: 848  As of 2007, 22 other entries describe similar preparations in Organic Syntheses
  3. ^ Cornélis, A. Laszlo, P.; Zettler, M. W. "Iron(III) Nitrate–K10 Montmorillonite Clay" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289.