性状：白色微晶或粉末。能被熔融的硫酸氢钾或苛性钾所分解，并与后者生成钽酸钾。溶于氢氟酸，不溶于水、乙醇和矿酸。半数致死量(大鼠，经口)8000mg/kg。
密度：7.6
熔点：1800℃

备注: 以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。

质量标准

Ta2O5                                 >99.99%  
杂质含量Impurity Contained (ppm  max)
Al                                    3
Mo                                    2
As                                    1
Na                                    5
B                                     1
Nb                                    15
Bi                                    2
Ni                                    3
Ca                                    5
Pb                                    3
Cl                                    10
Sb                                    5
Co                                    1
Si                                    10
Cr                                    3
Sn                                    1
Cu                                    3
Ti                                    1
F                                     50
V                                     1
Fe                                    5
W                                     3
K                                     5
Zr                                    1
Mg                                    2
L.O.I.0.                              1
Mn                                    2

贮存：密封保存。

用途：用于生产钽酸锂晶体和特种光学玻璃添加剂。

联合国编号：

Risk：R36/37/38-

Safety : S26 - S37/39-

Hazard : Xi -