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Overview
Trimethylaluminium (TMA) is a critical organometallic compound used primarily as a catalyst in polymerization processes. Produced via the reaction of aluminium metal with methyl chloride, its molecular formula is C3H9Al with CAS No. 75-24-1.
Application
- Polyethylene Production: Serves as a co-catalyst for Ziegler-Natta and metallocene systems to enhance polymer properties.
- Semiconductor Manufacturing: Utilized in atomic layer deposition (ALD) for depositing high-k dielectric films.
- Organic Synthesis: Acts as a methylation agent in specialized chemical transformations.
Precautions
- Storage: Must be kept under inert atmosphere (nitrogen or argon) at controlled temperatures to prevent spontaneous ignition.
- Safety: Highly pyrophoric; requires strict exclusion of moisture and air during handling and transport.
- Usage: Restricted to industrial applications only; not suitable for clinical or pharmaceutical use.