Iridium tetrachloride

Iridium tetrachloride
Identifiers
CAS Number	10025-97-5;
3D model (JSmol)	Interactive image;
ChemSpider	11252181;
ECHA InfoCard	100.030.032
EC Number	233-048-8;
PubChem CID	24815;
UNII	PCG7KVC21I;
CompTox Dashboard (EPA)	DTXSID10893602 ;
	InChI InChI=1S/4ClH.Ir/h4*1H;/q;;;;+4/p-4 Key: CALMYRPSSNRCFD-UHFFFAOYSA-J;
	SMILES Cl[Ir](Cl)(Cl)Cl;
Properties
Chemical formula	Cl4Ir
Molar mass	334.02 g·mol−1
Appearance	amorphous brown solid
Melting point	763 °C (1,405 °F; 1,036 K) (decomposes)
Solubility in water	soluble
Solubility	soluble in alcohol, dilute hydrochloric acid
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, 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

Iridium tetrachloride is an inorganic compound with the approximate formula IrCl₄(H₂O)_n. It is a water-soluble, hygroscopic amorphous dark brown solid. A well-defined derivative is ammonium hexachloroiridate ((NH₄)₂IrCl₆).^[2] It is used to prepare catalysts, such as the Henbest Catalyst for transfer hydrogenation of cyclohexanones.^[3]

References

1 2 PubChem. "Iridium tetrachloride". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-04-06.
↑ Thomas R. B. Mitchell (2001). "Iridium(IV) Chloride". E-EROS Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.ri050. ISBN 0-471-93623-5.
↑ E. L. Eliel; T. W. Doyle; R. O. Hutchins; E. C. Gilbert (1970). "cis-4-tert-Butylecyclohexanol". Org. Synth. 50: 13. doi:10.15227/orgsyn.050.0013.

[PubChem-1] 1 2 PubChem. "Iridium tetrachloride". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-04-06.

[2] Thomas R. B. Mitchell (2001). "Iridium(IV) Chloride". E-EROS Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.ri050. ISBN 0-471-93623-5.

[3] E. L. Eliel; T. W. Doyle; R. O. Hutchins; E. C. Gilbert (1970). "cis-4-tert-Butylecyclohexanol". Org. Synth. 50: 13. doi:10.15227/orgsyn.050.0013.

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