Iridium dioxide Chemical Properties

Melting point:

1100°C (dec.)

Density 

11,7 g/cm³

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

form 

Powder

Specific Gravity

11.66

color 

Black

Water Solubility 

INSOLUBLE

Crystal Structure

Rutile type

crystal system

square

Space group

P42/mnm

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.45051	0.45051	0.31586	90	90	90	0.0641

Major Application

battery manufacturing

InChI

InChI=1S/Ir.2O

InChIKey

HTXDPTMKBJXEOW-UHFFFAOYSA-N

SMILES

[Ir](=O)=O

CAS DataBase Reference

12030-49-8(CAS DataBase Reference)

NIST Chemistry Reference

Iridium dioxide(12030-49-8)

EPA Substance Registry System

Iridium oxide (IrO2) (12030-49-8)

Safety Information

Hazard Codes 

O;Xi,Xi,O

Risk Statements 

36/38-8

Safety Statements 

17-26-37/39

WGK Germany 

3

TSCA 

TSCA listed

HazardClass 

5.1

HS Code 

28259085

Storage Class

11 - Combustible Solids

MSDS

• Language:English Provider:Iridium(IV) oxide
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Iridium dioxide Usage And Synthesis

Chemical Properties

BLACK POWDER

Uses

Iridium(IV) oxide is used in the coating of anode-electrodes for industrial electrolysis in association with other rare oxides. It is also used in microelectrodes for electrophysiology research.

Synthesis

The iridium powder is obtained by heating to 107??C in air or oxygen, or by careful addition of a strong base to a boiling (IrCl6)2-solution, which produces a blue precipitate, the latter being dried in a vacuum, and then its hydrate is allowed to dehydrate completely in nitrogen at 350??C.

Iridium dioxide(12030-49-8)Related Product Information

• ETHYLENE OXIDE
• Calcium hydroxide
• Magnesium oxide
• Thiourea dioxide
• Boron oxide
• Carbon dioxide
• Stannic oxide
• Zirconium dioxide
• Lithium acetoacetate
• NITRIC OXIDE
• Iron oxide
• Iridium
• Calcium oxide
• Niobium oxide
• Zinc oxide
• Yttrium oxide
• Quartz
• Rutile