Thulium(III) nitrate


Thulium(III) nitrate is an inorganic compound, a salt of thulium and nitric acid with the chemical formula Tm(NO3)3.[1][2][3] The compound forms dark-green crystals, readily soluble in water, also forms crystalline hydrates.

Thulium(III) nitrate
Thulium nitrate.jpg
Other names
Thulium trinitrate, Thulium nitrate
  • 14985-19-4
  • pentahydrate: 36548-87-5
  • hexahydrate: 35725-33-8
3D model (JSmol)
  • Interactive image
  • pentahydrate: Interactive image
  • hexahydrate: Interactive image
  • tetrahydrate: Interactive image
  • 7974477
EC Number
  • pentahydrate: 628-321-7
  • pentahydrate: 71311313
  • hexahydrate: 215464
  • tetrahydrate: 140412984
  • pentahydrate: DTXSID70189255
  • pentahydrate: InChI=1S/3NO3.5H2O.Tm/c3*2-1(3)4;;;;;;/h;;;5*1H2;/q3*-1;;;;;;+3
  • hexahydrate: InChI=1S/3NO3.6H2O.Tm/c3*2-1(3)4;;;;;;;/h;;;6*1H2;/q3*-1;;;;;;;+3
  • tetrahydrate: InChI=1S/3NO3.4H2O.Tm/c3*2-1(3)4;;;;;/h;;;4*1H2;/q3*-1;;;;;+3
  • [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Tm+3]
  • pentahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.[Tm+3]
  • hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Tm+3]
  • tetrahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.[Tm+3]
Molar mass 354.949
Appearance Dark-green crystals
GHS labelling:
GHS03: OxidizingGHS07: Exclamation mark
H272, H315, H319, H335
P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501
Related compounds
Related compounds
Terbium(III) nitrate, Lutetium(III) nitrate, Cerium(III) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references


Reaction of thulium and nitric acid:[4]

Tm + 6HNO3 → Tm(NO3)3 + 3NO2 + 3H2O

Reaction of thulium hydroxide and nitric acid:

Tm(OH)3 + 3HNO3 → Tm(NO3)3 + 3H2O

Physical propertiesEdit

Thulium(III) nitrate forms dark-green hygroscopic crystals.

Forms crystalline hydrates of the composition Tm(NO3)3·5H2O.[5][6]

Soluble in water and ethanol.[7]

Chemical propertiesEdit

Both the compound and its crystalline hydrate decompose on moderate heating.

Hydrated thulium nitrate thermally decomposes to form TmONO3 and decomposes to thulium oxide upon further heating.


Thulium(III) nitrate hydrate is used as a reagent. Also used in optical glasses, ceramics, catalysts, electrical components, and photo-optical materials.[8]


  1. ^ Волков, А.И.; Жарский, И.М. (2005). Большой химический справочник (in Russian). Современная школа. p. 132. ISBN 985-6751-04-7.
  2. ^ Skerencak, A.; Panak, Petra J.; Hauser, W.; Neck, Volker; Klenze, R.; Lindqvist-Reis, P.; Fanghänel, Thomas (January 2009). "TRLFS study on the complexation of Cm(III) with nitrate in the temperature range from 5 to 200 °C". Radiochimica Acta. 97 (8). doi:10.1524/ract.2009.1631. S2CID 97982164. Retrieved 19 August 2021.
  3. ^ Modolo, Giuseppe; Kluxen, Paul; Geist, Andreas (January 2010). "Demonstration of the LUCA process for the separation of americium(III) from curium(III), californium(III), and lanthanides(III) in acidic solution using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tris(2-ethylhexyl)phosphate" (PDF). Radiochimica Acta. 98 (4). doi:10.1524/ract.2010.1708. S2CID 96774564.
  4. ^ Edelmann, Frank T.; Herrmann, Wolfgang A. (14 May 2014). Synthetic Methods of Organometallic and Inorganic Chemistry, Volume 6, 1997: Volume 6: Lanthanides and Actinides. Georg Thieme Verlag. p. 23. ISBN 978-3-13-179221-1. Retrieved 19 August 2021.
  5. ^ "Thulium(III) nitrate pentahydrate". Sigma Aldrich. Retrieved 19 August 2021.
  6. ^ Elements, American. "Thulium(III) Nitrate Pentahydrate". American Elements. Retrieved 19 August 2021.
  7. ^ Haynes, William M. (9 June 2015). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-95. ISBN 978-1-4822-6097-7. Retrieved 19 August 2021.
  8. ^ "14579 Thulium(III) nitrate hydrate, REacton®, 99.9% (REO)". Alfa Aesar. Retrieved 19 August 2021.