... , cell phones, and pagers, electronic circuitry; thin-film components; Tantalum Pentoxide Formula: Ta2O5 99.99% minCAS number: 1314-61-0Molar mass ... , white or light yellow color.Solubility in water insolubleApplication: Tantalum Pentoxide is Ta2O5, also known as tantalum(V) oxide. Ta2O5mainly used ... also the superior quality products. 99.99% high purity Tantalum Pentoxide