Tantalum(V) oxide
Tantalum(V) oxide (CAS: 1314-61-0; Formula: Ta2O5; Molar Mass: 441.89 g/mol) is a high-purity white powder. This refractory metal oxide is widely recognised for its exceptional dielectric properties, chemical inertness, and high refractive index. It finds critical applications in advanced ceramics, optical coatings, and as a catalyst in various chemical synthesis processes, contributing to the development of high-performance materials and efficient industrial reactions.
- IUPAC
- Tantalum pentoxide

Advanced Ceramics
Tantalum(V) oxide is a key component in the production of high-performance ceramics, particularly in capacitors due to its excellent dielectric properties. Its inclusion enhances the electrical insulation and thermal stability of ceramic materials.
Optical Coatings
Due to its high refractive index and transparency in the visible spectrum, Ta2O5 is extensively used in anti-reflective and high-reflectivity optical coatings for lenses, filters, and other optical components. It improves light transmission and reduces unwanted reflections.
Catalysis
In the field of catalysis, Tantalum(V) oxide serves as a heterogeneous catalyst or catalyst support. Its unique surface properties facilitate various organic transformations and oxidation reactions, offering selectivity and efficiency.
Materials Science
It is employed in materials science for developing new materials with specific electronic and optical characteristics. Applications include specialised glass formulations and thin-film deposition for electronic devices.
| Molecular weight | 441.89 |
|---|---|
| Linear formula | Ta2O5 |
| Assay | 99.99% trace metals basis |
| Form | powder |
| Density | 8.2 g/mL at 25 °C(lit.) |
| Particle size | <20 μm |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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) oxide used for?
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Tantalum(V) oxide is used in the manufacturing of advanced ceramics, optical coatings, and as a catalyst in chemical synthesis, owing to its excellent dielectric properties, high refractive index, and chemical inertness.
What are the CAS number and chemical formula for Tantalum(V) oxide?
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The CAS number for Tantalum(V) oxide is 1314-61-0, and its chemical formula is Ta2O5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tantalum(V) oxide with an assay of 99.99% trace metals basis. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety considerations for handling Tantalum(V) oxide?
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Handling Tantalum(V) oxide requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended to avoid inhalation. Ensure adequate ventilation.
How is Tantalum(V) oxide packed, shipped, and exported?
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Tantalum(V) oxide is carefully packaged to maintain its integrity during transit and is available for global export by Tech Serve Solutions.
How can I request a quote or sample for Tantalum(V) oxide?
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To request a quote or sample, please contact our sales team through the website or by phone, referencing the product name and CAS number.
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