Erbium(III) nitrate

Erbium(III) nitrate is an inorganic compound, a salt of erbium and nitric acid with the chemical formula Er(NO₃)₃.^[1][2][3] The compound forms pink crystals, readily soluble in water, also forms crystalline hydrates.^[4][5]

Erbium(III) nitrate

Names
Other names Erbium trinitrate, Erbium nitrate
Identifiers
CAS Number	10031-51-3 hexahydrate: 13476-05-6 pentahydrate: 10031-51-3
3D model (JSmol)	Interactive image hexahydrate: Interactive image pentahydrate: Interactive image
ChemSpider	pentahydrate: 21241306
EC Number	pentahydrate: 233-436-7
PubChem CID	hexahydrate: 202892 pentahydrate: 53249207
CompTox Dashboard (EPA)	hexahydrate: DTXSID60158935 pentahydrate: DTXSID60692900
InChI hexahydrate: InChI=1S/Er.3NO3.6H2O/c;3*2-1(3)4;;;;;;/h;;;;6*1H2/q+3;3*-1;;;;;; Key: SXJVNCWLEGIRSJ-UHFFFAOYSA-N pentahydrate: InChI=1S/Er.3NO3.5H2O/c;3*2-1(3)4;;;;;/h;;;;5*1H2/q+3;3*-1;;;;; Key: LWHHUEHWVBVASY-UHFFFAOYSA-N
SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Er+3] hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Er+3] pentahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.[Er+3]
Properties
Chemical formula	Er(NO3)3
Molar mass	353.274
Appearance	Pink crystals
Melting point	430 °C (806 °F; 703 K)
Solubility in water	Soluble
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H315, H318, H319, H335
Precautionary statements	P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501
Related compounds
Related compounds	Terbium(III) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Dissolving metallic erbium in nitric acid:

Er + 6 HNO₃ → Er(NO₃)₃ + 3 NO₂ + 3 H₂O ↑

Dissolving erbium oxide or hydroxide in nitric acid:

Er(OH)₃ + 3 HNO₃ → Er(NO₃)₃ + 3 H₂O ↑

Reaction of nitrogen dioxide with metallic erbium:

Er + 3 N₂O₄ → Er(NO₃)₃ + 3 NO ↑

Physical properties

Erbium(III) nitrate forms pink hygroscopic crystals.

Forms crystalline hydrates of the composition Er(NO₃)₃·5H₂O.

Both erbium(III) nitrate and its crystalline hydrate decompose on heating.

Dissolves in water and EtOH.^[6]

Chemical properties

The hydrated erbium nitrate thermally decomposed to form ErONO₃ and then to erbium oxide.

Applications

It is used to obtain metallic erbium and is also used as a chemical reagent.