Tantalum(V) butoxide
Tantalum(V) butoxide (CAS: 51094-78-1), with the molecular formula Ta(OCH2CH2CH2CH3)5 and a molecular weight of 546.52 g/mol, is a chemical compound supplied by Tech Serve Solutions. This liquid reagent is primarily utilised as a precursor in materials science and in various chemical synthesis applications, particularly where a soluble source of tantalum is required. Its properties make it valuable in the deposition of tantalum-containing thin films.

Precursor for Thin Film Deposition
Tantalum(V) butoxide serves as a volatile precursor for Atomic Layer Deposition (ALD) and Chemical Vapour Deposition (CVD) techniques. It enables the deposition of high-quality tantalum oxide and tantalum nitride films, essential in microelectronics for dielectric layers and diffusion barriers.
Catalysis
In catalysis, organometallic alkoxides like Tantalum(V) butoxide can act as homogeneous catalysts or catalyst precursors. Its Lewis acidity and the presence of tantalum make it suitable for certain organic transformations, although specific applications are niche.
Materials Science Research
Researchers utilise Tantalum(V) butoxide to synthesise novel tantalum-containing materials. Its solubility and reactivity allow for the development of advanced ceramics, glasses, and composite materials with tailored properties.
Chemical Synthesis Intermediate
This compound can be employed as an intermediate in the synthesis of other organotantalum compounds or as a reagent in reactions requiring a pentavalent tantalum source. Its alkoxide ligands can be displaced or modified to create new tantalum complexes.
| Molecular weight | 546.52 |
|---|---|
| Linear formula | Ta(OCH2CH2CH2CH3)5 |
| Assay | 99.99% trace metals basis |
| Form | liquid |
| Density | 1.31 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.483(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 40 °C / 104 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| Safety statements (S) | 16-26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Tantalum(V) butoxide used for?
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Tantalum(V) butoxide is primarily used as a precursor in thin film deposition via ALD and CVD for microelectronics, in materials science research for synthesising tantalum-containing materials, and as an intermediate in chemical synthesis.
What are the CAS number and chemical formula for Tantalum(V) butoxide?
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The CAS number for Tantalum(V) butoxide is 51094-78-1, and its linear chemical formula is Ta(OCH2CH2CH2CH3)5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tantalum(V) butoxide with a purity of 99.99% trace metals basis. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Tantalum(V) butoxide be handled safely?
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Tantalum(V) butoxide is a flammable liquid and vapour (H226) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle in a well-ventilated area, away from ignition sources, wearing appropriate personal protective equipment including eyeshields, gloves, and a suitable respirator. Avoid contact with skin, eyes, and clothing.
How is Tantalum(V) butoxide packed, shipped, and exported?
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Tantalum(V) butoxide is packed in compliance with all relevant transport regulations, including UN 1993 C 3 / PGIII classification. TSS exports chemicals globally, adhering to international shipping standards.
How can I request a quote or sample of Tantalum(V) butoxide?
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To request a quote or a sample of Tantalum(V) butoxide, please contact our sales department through the TSS website or by calling our customer service line. Specify the product name and CAS number when making your request.
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