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Trimethylindium丨CAS 3385-78-2

CAS: 3385-78-2
Chemical Formula: TMI

Trimethylindium (TMI) is an organic indium source that appears as white crystals under normal conditions. It is widely considered a core precursor for the preparation of III-V compounds such as indium phosphide, indium nitride, and indium gallium nitride using MOCVD and ALD technologies. Its high purity and stable biochemical properties make it an irreplaceable player in high-speed communications, optoelectronic materials, and high-end display technologies.
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Trimethylindium Basic Properties

SynonymsLiquid indium;Trimethlindium;trimethylindigane;Indium, trimethyl-;Trimethylindium, TMI;TMIn;TRIMETHYLINDIUM  (99.9%IN)
Molecular FormulaC3H9In
AppearanceWhite crystal
Molecular Weight159.92
Melting Point88°C
Boiling Point135.7°C
Density1,568 g/cm3
SensibilityHeat and moisture sensitive
Storage ConditionsStore cold
Purity≧ 98%
Package Information25g;100g;500g or customized

Trimethylindium Key Features

High-purity indium source

Trimethylindium provides a high-purity indium source, typically exceeding 6N purity. This ensures the high quality of downstream indium-based materials and the excellent electrical properties and low defect density of epitaxial materials.

Stable sublimation characteristics

Compared to liquid precursors, solid TMI is delivered via sublimation, eliminating issues such as liquid splashing and concentration fluctuations. This ensures extremely precise and repeatable supply of the indium component, ensuring high uniformity and epitaxial growth of complex multilayer structures.

Chemical stability

Trimethylindium exhibits high chemical stability during the deposition process, effectively preventing unwanted side reactions and ensuring the quality and uniformity of the deposited film.

Broad process compatibility

Whether used to grow InP, InAs, or InGaN, TMI demonstrates excellent reaction efficiency and film quality, meeting diverse application requirements from telecommunications bands to the visible light band.

Trimethylindium Main Applications

Semiconductor manufacturing

Trimethylindium is an important precursor for III-V semiconductor materials (such as InGaAs and InP) and is widely used in the manufacture of high-tech equipment such as semiconductor chips and optoelectronic devices.

Optoelectronic materials

TMI is used in the MOCVD process to manufacture high-efficiency optoelectronic devices such as light-emitting diodes (LEDs) and laser diodes (LDs).

Thin film deposition

Trimethylindium is used to prepare indium-based thin films for applications in solar cells, displays, electronic components, and more.

High-frequency electronic devices

TMI is used to manufacture high-frequency electronic components, such as radio frequency (RF) components and microwave devices, which are widely used in communications, radar, and other fields.

Precautions

  1. Moisture can cause trimethylindium to decompose or cause adverse reactions. Avoid contact with water. Keep the storage area cool, dry, and well-ventilated.

  2. This product should not be stored together with strong oxidants or strong acids to avoid unsafe reactions.

  3. TMI is typically stored and packaged in specially surface-treated steel cylinders. When in use, precise temperature control of the source cylinder is required to achieve stable sublimation and delivery.

  4. Personal protective equipment such as safety glasses, gloves and protective clothing must be worn when handling this product.

  5. When disposing of waste, relevant environmental protection laws and regulations should be followed, and careless discarding should be avoided to ensure that waste is handled professionally.

FAQ

1. How does trimethylindium differ from other indium sources?

It has high volatility and stability, making it suitable for high-precision vapor deposition processes and capable of providing a uniform, high-purity indium source.


2. What are the key differences in application between trimethylindium (TMI) and triethylindium (TEI)?

The primary difference between the two lies in their physical state and thermal stability. TMI is a solid, delivered by sublimation, offering excellent stability and precise delivery control, making it the preferred choice for mainstream MOCVD processes. TEI is a liquid that easily decomposes at room temperature, requires more stringent storage conditions, and may present delivery stability challenges. Therefore, its application range is far less extensive than that of TMI. In most cases, especially in applications requiring extremely high composition control (such as InGaN LEDs), TMI is a better choice.


Wolfa professionally supplies Trimethylindium, supporting small-batch sampling and large-volume procurement needs. Packaging options include ordinary glass bottles, glass ampoules, metal ampoules, etc.


For product analysis reports (such as COA) or procurement consulting, please feel free to contact us at jomin@wolfabio.com at any time.

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