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206237

Sigma-Aldrich

Iridium(IV) oxide

99.9% trace metals basis

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Synonym(s):
Iridium dioxide
Linear Formula:
IrO2
CAS Number:
Molecular Weight:
224.22
EC Number:
MDL number:
eCl@ss:
38191204
PubChem Substance ID:
NACRES:
NA.23

Assay

99.9% trace metals basis

form

powder

application(s)

battery manufacturing

SMILES string

O=[Ir]=O

InChI

1S/Ir.2O

InChI key

HTXDPTMKBJXEOW-UHFFFAOYSA-N

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This Item
230693398500342254
Iridium(IV) oxide 99.9% trace metals basis

Sigma-Aldrich

206237

Iridium(IV) oxide

Zirconium(IV) oxide powder, 5 μm, 99% trace metals basis

Sigma-Aldrich

230693

Zirconium(IV) oxide

Rhenium(IV) oxide 99.7% trace metals basis

Sigma-Aldrich

342254

Rhenium(IV) oxide

form

powder

form

powder

form

powder

form

powder

application(s)

battery manufacturing

application(s)

battery manufacturing

application(s)

-

application(s)

-

Quality Level

100

Quality Level

200

Quality Level

100

Quality Level

100

General description

Iridium oxide is a ceramic material with unique properties like long-term stability, sensitivity, electrochemical catalytic activity, and excellent biocompatibility. It can be formed from Ir metal by different methods like thermal decomposition, reactive sputtering, and electrochemical deposition. It is widely used in bio-electronic devices.

Application

Iridium(IV) oxide can be used as:
  • An indicator electrode in solid-state pH sensors.
  • Coating material for stimulation electrodes.
  • An anodic catalyst for oxygen evolution through a water-splitting reaction in a polymer electrolyte membrane (PEM) cell.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Igor A Ges et al.
Biosensors & bioelectronics, 34(1), 30-36 (2012-03-09)
Release of neurotransmitters and hormones by calcium regulated exocytosis is a fundamental cellular/molecular process that is disrupted in a variety of psychiatric, neurological, and endocrine disorders. Therefore, this area represents a relevant target for drug and therapeutic development, efforts that
Yixin Zhao et al.
Small (Weinheim an der Bergstrasse, Germany), 7(14), 2087-2093 (2011-06-17)
A facile, in-situ deposition route to stable iridium oxide (IrO(x)·nH(2)O) nanoparticle thin films from [Ir(OH)(6)](2-) solutions is reported. The [Ir(OH)(6)](2-) solution, made by alkaline hydrolysis of [IrCl(6)](2-), is colorless and stable near neutral pH, and forms blue IrO(x)·nH(2)O nanoparticle suspensions
Yoon Sung Nam et al.
Nanoscale, 4(11), 3405-3409 (2012-05-11)
A highly porous electrode comprised of biologically templated iridium oxide-gold (IrO(2)-Au) hybrid nanowires is introduced for electrochromic applications. A filamentous M13 virus is genetically engineered to display IrO(2)-binding peptides on the viral surface and used as a template for the
Chia-Ching Wang et al.
Langmuir : the ACS journal of surfaces and colloids, 27(23), 14253-14259 (2011-11-04)
In this study, we employed density functional theory (DFT) to investigate the oxidation of ammonia (NH(3)) on the IrO(2)(110) surface. We characterized the possible reaction pathways for the dehydrogenation of NH(x) species (x = 1-3) and for the formation of
Elisabet Prats-Alfonso et al.
Biosensors & bioelectronics, 39(1), 163-169 (2012-08-04)
This work demonstrates the implementation of iridium oxide films (IROF) grown on silicon-based thin-film platinum microelectrodes, their utilization as a pH sensor, and their successful formatting into a urea pH sensor. In this context, Pt electrodes were fabricated on Silicon

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