Indium Oxide, Indium Trioxide, 1312-43-2

Indium Oxide, Indium Trioxide, 1312-43-2

🧪 Indium(III) Oxide (In₂O₃)

Indium(III) oxide, also known as Indium trioxide, is a white to pale yellow crystalline inorganic compound. It is a wide-bandgap semiconductor with important applications in electronics, optoelectronics, transparent conductive coatings, ceramics, and catalysis.

1️⃣ Chemical Identity

• Chemical Name: Indium(III) Oxide

• Formula: In₂O₃

• Molecular Weight: 277.64 g/mol

• CAS Number: 1312-43-2

• EC Number: 215-193-9

• Appearance: White to pale yellow crystalline powder

• Density: ~7.18 g/cm³

• Melting Point: ~1,910 °C

• Bandgap: ~2.9 eV (semiconducting)

• Solubility: Insoluble in water; soluble in acids

2️⃣ Physical & Chemical Properties

• Semiconductor Behavior: Wide bandgap, suitable for optoelectronic devices.

• Optical Properties: Transparent in visible light; used in thin films for displays.

• Electrical Properties: High conductivity when doped (commonly with tin → ITO).

• Thermal Stability: Stable at high temperatures.

• Chemical Reactivity: Reacts with acids to form indium salts.

3️⃣ Applications

• Electronics & Optoelectronics:

  • Transparent conductive oxide (TCO) in displays, solar cells, and LEDs.

  • Indium tin oxide (ITO) thin films widely used in touchscreens and flat-panel displays.

• Ceramics:

  • Additive in advanced ceramics for improved properties.

• Catalysis:

  • Catalyst in organic reactions.

• Glass & Coatings:

  • Used in coatings to provide transparency and conductivity.

• Research:

  • Nanostructures and thin films studied for advanced material science.

4️⃣ Synonyms

• Indium Oxide

• Indium(III) Oxide

• Indium Trioxide

• In₂O₃

5️⃣ Safety & Handling

• Toxicity: Low to moderate; inhalation of fine powders may cause irritation.

• Precautions: Gloves, goggles, and dust masks recommended.

• Storage: Keep in dry, sealed containers; protect from moisture.

• Waste Disposal: Follow hazardous waste regulations.

📌 Summary: Indium(III) Oxide (CAS 1312-43-2) is a semiconducting, transparent, and stable oxide with critical roles in electronics, optoelectronics, coatings, ceramics, and catalysis.