Iridium Nitrate Solution

Basic Information of Iridium Nitrate Solution

CAS No.	18496-38-3
EC No.	242-409-6
Chemical Formula	Ir(NO₃)₃ (aq.)
Molecular Weight	352.24 g/mol (anhydrous basis)
Appearance	Clear to pale yellow or greenish liquid (aqueous solution, typically 5–20% Ir w/w)
Odor	Odorless to slight nitric
Melting point	Not applicable (liquid solution)
Boiling point	>100 °C (water-based; decomposes on heating)
Density	1.05–1.40 g/mL at 25 °C (concentration-dependent)
Solubility	Miscible with water; soluble in alcohols, acetone, acetonitrile
Nature (hazards)	Oxidizing liquid, may intensify fire, causes skin and eye irritation, harmful if swallowed, toxic to aquatic life
RIDADR	UN 3099, Oxidizing liquid, corrosive, n.o.s. (Iridium nitrate solution), Class 5.1 (8), Packing Group III
Chemical Structure

Primary Applications of Iridium Nitrate Solution

Iridium Nitrate Solution provides a clean, ready-to-use iridium source for solution processing, enabling precise Ir incorporation in high-technology and catalytic applications.

1. Supported Iridium Catalyst Impregnation
   Used in wet impregnation of carbon, alumina, silica, or other supports to create high-dispersion Ir catalysts for hydrogenation, ammonia oxidation, and fuel cell applications.

2. Iridium Electroplating & Surface Finishing
   Provides Ir(III) ions for electrolytic deposition of bright, corrosion-resistant iridium coatings on electrical contacts, spark plugs, and high-reliability electronic components.

3. Thin-Film Iridium Deposition
   Ideal for spin-coating, dip-coating, or ink formulations to produce iridium electrodes, seed layers, or catalytic films in microelectronics and sensors.

4. Organometallic Iridium Complex Synthesis
   Acts as a halide-free Ir(III) precursor for preparing phosphine, carbene, or amine Ir complexes used in homogeneous catalysis and materials research.

5. Electrocatalyst Development for Energy Applications
   Enables synthesis of Ir-based electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution, and alcohol oxidation in electrolyzers and fuel cells.

6. Advanced Materials & Nanotechnology
   Facilitates controlled reduction to generate iridium nanostructures, functional coatings, or supported clusters requiring high purity and controlled Ir loading.

• Accurate & Consistent Ir Concentration
  Precise analytical control ensures uniform iridium content, low impurities, and batch reproducibility for reliable deposition or catalytic performance.

• Halide-Free Formulation
  Nitrate-based solution eliminates chloride risks, ideal for electronics, fuel cells, and processes demanding ultra-high purity iridium.

• Custom Solution Tailoring
  Adjustable Ir levels, concentration ranges, and minor additives to perfectly match your specific process or formulation requirements.

• Technical Process Support
  Dedicated specialists provide advice on solution handling, deposition techniques, catalyst activation, and optimization for maximum efficiency.

• Regulatory & Sustainability Focus
  Full COA, REACH, RoHS, SDS documentation and iridium recycling programs to support global compliance and your ESG commitments.

Hazards Classification

• GHS Classification: Oxidizing Liquids (Category 2 or 3); Acute Toxicity, Oral (Category 4); Skin Corrosion/Irritation (Category 1B or 2); Serious Eye Damage (Category 1); Aquatic Chronic (Category 2 or 3)

• Hazard Statements: H272: May intensify fire; oxidizer; H302: Harmful if swallowed; H314 or H315: Causes severe skin burns or irritation; H318: Causes serious eye damage; H411: Toxic to aquatic life with long lasting effects

• UN Number: UN 3099

• Hazard Class: 5.1 (Oxidizing substances) + 8 (Corrosive)

• Packing Group: III