Iridium tetrabromide

Iridium tetrabromide
Names
	Other names Iridium(IV) bromide; Tetrabromoiridium;
Identifiers
CAS Number	7789-64-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	13905634;
ECHA InfoCard	100.029.255
EC Number	232-180-3;
PubChem CID	14029372;
CompTox Dashboard (EPA)	DTXSID70999078;
	InChI InChI=1S/4BrH.Ir/h4*1H;/q;;;;+4/p-4 Key: IYWTUWKWQJIZPO-UHFFFAOYSA-J;
	SMILES Br[Ir](Br)(Br)Br;
Properties
Chemical formula	Br4Ir
Molar mass	511.833 g·mol−1
Appearance	black crystalline solid
Solubility in water	soluble
Solubility	alcohol
Related compounds
Related compounds	Osmium tetrabromide
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, 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 tetrabromide is a binary inorganic compound of iridium and bromine with the chemical formula IrBr₄.^[4] It is a deliquescent black solid.^[2]

Synthesis

Iridium tetrabromide can be prepared by reacting iridium(IV) oxide with hydrobromic acid:

IrO₂ + 4HBr → IrBr₄ + 2H₂O

Iridium tetrabromide reacts with water:

IrBr₄ + 4H₂O → Ir(OH)₄ + 4HBr

Iridium tetrabromide decomposes when heated:

IrBr₄ → Ir + 2Br₂

↑ Holloway, Michael D.; Holloway, Emma (15 December 2020). Dictionary of Industrial Terminology. John Wiley & Sons. p. 623. ISBN 978-1-119-36344-6. Retrieved 5 May 2023.
1 2 Comey, Arthur Messinger (1896). A Dictionary of chemical solubilities. Macmillan and Company. p. 192. Retrieved 5 May 2023.
↑ PubChem. "Iridium bromide (IrBr4)". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-04-06.
↑ Roscoe, Henry Enfield; Schorlemmer, Carl (1895). A Treatise on Chemistry. D. Appleton. p. 445. Retrieved 5 May 2023.

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