| Formula / Notation | In |
|---|---|
| CAS Number | 7440-74-6 |
| Molecular Weight | 114.82 |
| Melting Point | 156.6 |
| Boiling Point | 2072.0 |
| Density | 7.31 |
| Solubility | Insoluble in water |
| Appearance | Soft, silvery-white, lustrous metal |
| Also Known As | In, indium metal |
| Category | Elements |
What is Indium?
Indium is a soft, silvery-white post-transition metal, atomic number 49. Emits a high-pitched squeal when bent (indium cry). Critical material for thin-film solar cells (CIGS) and ITO electrodes in touchscreens and flat panel displays.
Formula & Notation
IUPAC Name: Indium
Other Names / Synonyms: In, indium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 156.6 |
| Boiling Point | 2072.0 |
| Density | 7.31 |
| Molecular Weight | 114.82 |
| Solubility | Insoluble in water |
| Appearance | Soft, silvery-white, lustrous metal |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Indium is a soft, silvery-white post-transition metal, atomic number 49. Emits a high-pitched squeal when bent (indium cry). Critical material for thin-film solar cells (CIGS) and ITO electrodes in touchscreens and flat panel displays.
Indium tin oxide (ITO) transparent electrodes (touchscreens, LCDs, solar cells). CIGS thin-film solar cells (CuInGaSe2). Low-melting point alloys. Semiconductor dopant (InP, InGaAs). Bearings and dental alloys. Nuclear reactor bearings.
Indium metal: low acute toxicity. Indium compounds: moderate toxicity. Indium lung: rare but serious lung disease from occupational inhalation of indium compounds in ITO manufacturing. OSHA PEL: 0.1 mg/m3. Requires respiratory protection in manufacturing.
The formula or notation for Indium is: In