Nomenclature
CAS number: 1314-61-0
Tantalum oxide (Ta
2O
5); tantalic acid anhydride.
O
5Ta
2; mol wt 441.89.
O 18.10%, Ta 81.90%.
Ta
2O
5.
Description and references
Acute toxicity: K. W. Cochran et al., Arch. Ind. Hyg. Occup. Med. 1, 637 (1950).
Properties
White, microcrystalline, infusible powder. Insol
in water, alcohol, mineral acids. Sol in HF. Dec by fusing with
KHSO4 or KOH, forming potassium tantalate with the latter.
LD50 orally in
rats: 8000 mg/kg (Cochran).