Indium(III) nitrate

Indium(III) nitrate

Identifiers
CAS Number	anhydrous: 13770-61-1 Y monohydrate: 13465-14-0 trihydrate: 15650-88-1
3D model (JSmol)	anhydrous: Interactive image monohydrate: Interactive image trihydrate: Interactive image tetrahydrate: Interactive image
ChemSpider	anhydrous: 24472 monohydrate: 2341257 trihydrate: 26948018
ECHA InfoCard
EC Number	anhydrous: 237-393-5
E number
PubChem CID	anhydrous: 26265 monohydrate: 3084148 trihydrate: 91886655 tetrahydrate: 138753438 pentahydrate: 22446589
RTECS number	anhydrous: NL1750000
UNII	anhydrous: WOP84073FA Y
CompTox Dashboard (EPA)	anhydrous: {{#property:P3117}}
InChI InChI=1S/In.3NO3/c;3*2-1(3)4/q+3;3*-1 Key: LKRFCKCBYVZXTC-UHFFFAOYSA-N monohydrate: InChI=1S/In.3NO3.H2O/c;3*2-1(3)4;/h;;;;1H2/q+3;3*-1; Key: YZZFBYAKINKKFM-UHFFFAOYSA-N trihydrate: InChI=1S/In.3NO3.3H2O/c;3*2-1(3)4;;;/h;;;;3*1H2/q+3;3*-1;;; Key: HVDZMISZAKTZFP-UHFFFAOYSA-N tetrahydrate: InChI=1S/In.3NO3.4H2O/c;3*2-1(3)4;;;;/h;;;;4*1H2/q+3;3*-1;;;; Key: ZYYDOSLSINDXIQ-UHFFFAOYSA-N
SMILES anhydrous: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[In+3] monohydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O trihydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O.O.O tetrahydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O.O.O.O
Properties
Chemical formula	In(NO3)3
Molar mass	300.83 g/mol
Appearance	White solid
Density	2.43 g/cm3 (pentahydrate)
Melting point	100 °C (212 °F; 373 K) (decomposes, hydrate)
Solubility in water	Soluble
Structure
Crystal structure	Monoclinic
Space group	C2/c
Lattice constant	a = 10.35 Å, b = 9.17 Å, c = 11.25 Å α = 90°, β = 91.05°, γ = 90°
Lattice volume (V)	1068 Å3
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H272, H315, H319, H335
Precautionary statements	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
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Indium(III) nitrate is a nitrate salt of indium which forms various hydrates. Only the pentahydrate has been crystallographically verified. Other hydrates are also reported in literature, such as the trihydrate.

Production and reactions

Indium(III) nitrate hydrate is produced by the dissolution of indium metal in concentrated nitric acid followed by evaporation of the solution:

In + 4 HNO₃ → In(NO₃)₃ + NO + 2 H₂O

The hydrate first decomposes to a basic salt and then to indium(III) oxide at 240 °C. Anhydrous indium(III) nitrate is claimed to be produced by the reaction of anhydrous indium(III) chloride and dinitrogen pentoxide.

In the presence of excess nitrate ions, indium(III) nitrate converts to the [In(NO₃)₄]⁻ ion.

The hydrolysis of indium(III) nitrate yields indium(III) hydroxide. It also reacts with sodium tungstate to form In(OH)WO₄, [In(OH)₂]₂WO₄, NaInWO₄ or In₂(WO₄)₃ depending on pH.

Structure

Only the pentahydrate has been structurally elucidated. The pentahydrate consists of octahedral [In(NO₃)(H₂O)₅]²⁺ centers as well as two nitrates and is monoclinic.