![]() α-IrCl3
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![]() β-IrCl3
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![]() Iridium(III) chloride trihydrate
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Names | |
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Other names
Iridium trichloride
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Identifiers | |
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3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.030.028 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
IrCl3 | |
Molar mass | 298.58 g/mol (anhydrous)
316.60 g/mol (hydrate) |
Appearance | brown solid (α-anhydrous) red solid (β-anhydrous) dark green solid (trihydrate) |
Density | 5.30 g/cm3, solid[1] |
Melting point | 763 °C (1,405 °F; 1,036 K)[1][2] (decomposes) |
insoluble (anhydrous IrCl3), soluble (hydrated derivative)[1] | |
Solubility | Insoluble in HCl and alkanes[1] |
−14.4·10−6 cm3/mol | |
Structure | |
Monoclinic, mS16 | |
C12/m1, No. 12 | |
Thermochemistry | |
Std enthalpy of
formation (ΔfH⦵298) |
-257 kJ/mol |
Hazards | |
GHS labelling:[3] | |
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Warning | |
H302, H411 | |
Flash point | non-flammable |
Related compounds | |
Other cations
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Rhodium(III) chloride |
Related compounds
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Platinum(II) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iridium(III) chloride is the inorganic compound with the formula IrCl3. The anhydrous compound is relatively rare, but the related hydrate is much more commonly encountered. The anhydrous salt has two polymorphs, α and β, which are brown and red colored respectively. More commonly encountered is the hygroscopic dark green trihydrate IrCl3(H2O)3 which is a common starting point for iridium chemistry.[4]
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