Tantalum Ethoxide (CAS: 6074-84-6): Properties, Applications, and Safety
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Introduction
Tantalum Ethoxide, with the chemical formula Ta(OC₂H₅)₅, is an organometallic compound used in various high-tech applications. It is a tantalum-based alkoxide known for its role in thin-film deposition, electronic materials, and catalysis. This article explores the properties, applications, and safety considerations of Tantalum Ethoxide.
Chemical and Physical Properties
Molecular Formula and Structure
– Chemical Formula: Ta(OC₂H₅)₅
– Molecular Weight: Approximately 364.27 g/mol
– Appearance: Colorless to pale yellow liquid
– Boiling Point: Decomposes before boiling
– Solubility: Soluble in organic solvents such as ethanol and toluene
Key Characteristics
– Highly reactive with moisture
– Used as a precursor in chemical vapor deposition (CVD) and atomic layer deposition (ALD)
– Thermally unstable, requiring careful handling
Applications
Electronics and Semiconductor Industry
Tantalum Ethoxide is widely used in the semiconductor industry, particularly in thin-film deposition techniques like CVD and ALD. These processes help create tantalum oxide coatings, which are essential for:
– High-k dielectrics in capacitors
– Gate oxides in transistors
– Protective layers in integrated circuits
Optical Coatings
Tantalum Ethoxide is a key precursor for tantalum pentoxide (Ta₂O₅), a material with excellent optical properties. It is commonly used in:
– Anti-reflective coatings
– High-refractive-index optical films
– Waveguides in photonics
Catalysis and Chemical Synthesis
Tantalum-based alkoxides, including Tantalum Ethoxide, are employed as catalysts in organic synthesis and polymerization reactions. Their role in advanced material synthesis makes them valuable in research and industrial applications.
Safety and Handling
Hazards
– Moisture Sensitivity: Reacts with water to form tantalum oxides and ethanol
– Flammability: Organic alkoxides can be combustible
– Health Risks: Can cause irritation to skin, eyes, and respiratory tract
Safe Handling Practices
– Store in a dry, inert atmosphere to prevent moisture exposure
– Handle in a fume hood with appropriate personal protective equipment (PPE)
– Use non-reactive containers, as it can degrade in the presence of moisture or acids
Conclusion
Tantalum Ethoxide (CAS: 6074-84-6) is a crucial precursor in advanced materials science, particularly in the semiconductor, optical, and catalytic industries. Its high reactivity and specific applications make it indispensable in modern technology, though proper handling and safety measures are essential. As research continues, new uses for this versatile compound are likely to emerge, further expanding its role in cutting-edge material development.