MSE PRO Tantalum (V) Oxide (Ta2O5) 99.9% 3N Powder

SKU: PO3602

  • $ 23595
  • Save $ 2900

Tantalum (V) Oxide, Ta2O5, 99.9% 3N High Purity Powder

  • Product Number: PO3602 (100 g), PO3603 (1 kg)
  • Formula: Ta2O5
  • CAS Number: 1314-61-0
  • Molecular Weight: 441.89 g/mol
  • Density: 8.18 g/cm³ at 25°C
  • Melting Point: 1872°C
  • Particle size: D50 - 1-3um
  • Color: white powder
  • Solubility: Insoluble in water. Attacked by strong bases and Hydrofluoric Acid
  • Purity: 99.9% 3N (trace metals basis)


Ta2O5 (Tantalum (V) Oxide or Tantalum Pentoxide) is used in ceramics, glass, and capacitor materials.  Due to its dielectric constant and high band gap it has been used extensively in electronics.  Other uses include optics and glass due to its high refractive index.  Ta2O5 is also a material used to produce Ta-doped LLZO garnet solid state electrolyte materials, which can be ordered from MSE Supplies. 

Notes: More detailed product information including SDS, certificate of analysis (COA), lead time and volume pricing are available upon request.

Typical Lot analysis

Elemental Analysis (ppm)

Nb   30

Si   20

Ti   10

F   630

W   20

Pb   10

Mo   10

Sn   20

Cr   10

Ca   20

Mn   10

Mg   20

Fe   15

Zr   20

Ni   10

C   50

Cu   10

S   30

Al   10


Trace metals analysis: ICP



H. Chen, G. Feng, W. Fan, J. Han, Y. Li, and Q. Lai. Laser plasma-induced damage characteristics of Ta2O5 films. Optical Materials Express Vol 9(7) Art#368106, 2019.

A. Zykova, V. Safonov, A. Goltsev, T. Dubrava, I. Rossokha, N. Donkov, S. Yakovin, D. Kolesnikov, I. Goncharov, and V. Georgieva. Surface modification of Ta2O5 coatings deposited by magnetron sputtering and correlation with cell adhesion and proliferation in in vitro tests. J. Phys: Conference Serries 700, 2016. Doi:10.1088/1742-6596/700/1/012027.