Indium acetate is an acetate of indium, with the chemical formula In(CH3COO)3. It is soluble in water, acetic acid, and mineral acids. It is the precursor of indium-containing compounds such as the solar cell materials CuInS2 and indium phosphide quantum dots. It is typically a white or off-white crystalline powder. It is soluble in various organic solvents such as acetone, ethanol, and methanol, but it is relatively insoluble in water.
It is primarily used in the production of semiconductors, particularly in the manufacturing of thin-film transistors (TFTs) for liquid crystal displays (LCDs). It is also used in the synthesis of various indium-containing compounds and as a catalyst in some organic reactions.
Properties
- Chemical formula: In(CH3COO)3
- Molar mass: 291.96
- Appearance: white hygroscopic powder
- Melting Point: approximately 196-200°C
- Stability: relatively stable under normal conditions, but it may decompose when exposed to high temperatures
Preparation
Indium acetate can be prepared by reacting indium or triethylindium with frozen acetic acid.
Chemical properties
Indium acetate can react with propionic acid:
In(CH3COO)3 + CH3CH2COOH → In(CH3COO)2(CH3CH2COO) + CH3COOH
Application
Indium acetate can be used in various chemical processes, such as the synthesis of other indium compounds or as a precursor in the production of indium-containing materials like indium tin oxide (ITO). ITO is a transparent and electrically conductive material used in the manufacturing of touch screens, liquid crystal displays (LCDs), solar cells, and other optoelectronic devices.
Toxicity
Like many indium compounds, indium acetate is generally considered to be of low toxicity. However, inhalation or ingestion of large amounts should be avoided, as it can potentially lead to health problems. When working with indium acetate, standard laboratory safety precautions should be followed. It should be stored in a cool, dry place, away from incompatible materials and open flames.
