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. When dissolved, it forms yellow solution due to hydrolysis.
Nitric acid, iron(3+) salt
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||403.999 g/mol (nonahydrate) |
241.86 g/mol (anhydrous)
|Appearance||Pale violet crystals |
|Density||1.68 g/cm3 (hexahydrate) |
|Melting point||47.2 °C (117.0 °F; 320.3 K) (nonahydrate)|
|Boiling point||125 °C (257 °F; 398 K) (nonahydrate)|
|150 g/100 mL (hexahydrate)|
|Solubility||soluble in alcohol, acetone|
|Safety data sheet||External SDS|
|GHS Signal word||Warning|
|H272, H302, H319|
|P210, P220, P221, P264, P270, P280, P301+312, P305+351+338, P330, P337+313, P370+378, P501|
|NFPA 704 (fire diamond)|
|NIOSH (US health exposure limits):|
|TWA 1 mg/m3|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
- Fe + 4 HNO3 → Fe(NO3)3 + NO + 2 H2O.
In the chemical laboratory
- 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.
Ferric nitrate solutions are used by jewelers and metalsmiths to etch silver and silver alloys.
- HSNO Chemical Classification Information Database, New Zealand Environmental Risk Management Authority, retrieved 2010-09-19.
- "Iron(III) Nitrate Nonahydrate". American Elements. Retrieved June 20, 2019.
- NIOSH Pocket Guide to Chemical Hazards. "#0346". National Institute for Occupational Safety and Health (NIOSH).
- Hampton, K. G. Harris, T. M.; Hauser, C. R. (1973). "2,4-Nonanedione". Organic Syntheses.CS1 maint: multiple names: authors list (link); Collective Volume, 5, p. 848 As of 2007, 22 other entries describe similar preparations in Organic Syntheses
- 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.