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Tantalum pentoxide Structure

Tantalum pentoxide

Chemical Properties

Melting point 1872 °C
Density  8.2 g/mL at 25 °C(lit.)
storage temp.  Sealed in dry,Room Temperature
solubility  insoluble in H2O, ethanol, acid solutions; sHF
form  lumps
color  White to white-beige
Specific Gravity 8.2
Resistivity 1.0 ∞ 10*12 (ρ/μΩ.cm)
Water Solubility  Insoluble in water.
Crystal Structure Trigonal
Merck  14,9056
crystal system Nogata
Space group Pmm2
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.38884.0290.61989090900.9709
Dielectric constant 11.6(Ambient)
Exposure limits OSHA: TWA 5 mg/m3
NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3
InChI InChI=1S/5O.2Ta
InChIKey PBCFLUZVCVVTBY-UHFFFAOYSA-N
SMILES [Ta](=O)(=O)O[Ta](=O)=O
CAS DataBase Reference 1314-61-0(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII OEZ64Z53M4
EPA Substance Registry System Tantalum oxide (Ta2O5) (1314-61-0)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H320
Precautionary statements P264-P337+P313-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  37/39-26
WGK Germany  -
RTECS  WW5855000
TSCA  Yes
HS Code  28259085
Toxicity LD50 orally in rats: 8000 mg/kg (Cochran)
NFPA 704:
1
0 0

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