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Tantalum Oxide Powder (Ta2O5), CAS No 1314-61-0

Tantalum Oxide Powder (Ta2O5), CAS No 1314-61-0

Tantalum oxide powder, also known as tantalum pentoxide, is a white, crystalline powder that is insoluble in water and most acids. It has a high melting point of over 1,872 °C and is a high-dielectric material, which makes it useful for various electronic applications.

Tantalum oxide powder is commonly used as a dielectric material in capacitors, as it has a high dielectric constant and low leakage current. It is also used as a coating material in optical and electronic devices, due to its high refractive index and excellent optical properties. Additionally, tantalum oxide powder is used in the production of tantalum capacitors, which are used in various electronic devices such as computers, smartphones, and other consumer electronics.

Tantalum Oxide Powder Properties (Theoretical)

Compound Formula O5Ta2
Molecular Weight 441.89
Appearance white, odorless powder
Melting Point 1,872° C (3,402° F)
Boiling Point N/A
Density 8.2 g/cm3
Solubility in H2O N/A
Exact Mass 212.938 g/mol
Monoisotopic Mass 441.870573 Da


Particle Size 20 mesh to 500 mesh/Customized
Purity 99.9%, 99.99%, 99.999%
CAS 1314-61-0

Tantalum Oxide Powder Specifications

Item No.

Particle Size (FSSS)

Purity (Impurities in Oxides)


 0.5~2 µm

Ta2O5 > 99.9% (metals basis), Nb < 0.005%, Fe < 0.005%, Si < 0.002% Ti < 0.002%, Ni < 0.002%, W < 0.003%


 1~3 µm

Ta2O5 > 99.99% (metals basis), Nb < 10 ppm, Fe < 10 ppm, Si < 10 ppm Ti < 3 ppm, Ni < 3 ppm, W < 5 ppm

Tantalum Oxide Powder Applications

Tantalum oxide powder can be used as a raw material for producing metallic tantalum. It is also used in the electronics industry. It is used for pulling lithium tantalate single crystals and manufacturing special optical glass with high refraction and low dispersion. It can be used as a catalyst in the chemical industry.

Tantalum Pentoxide Powder Synonyms

Tantalum oxide (Ta2O5), Ditantalum pentaoxide, Tantalum oxide dust, Tantalum pentaoxide.


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