| Melting point |
2996 °C (lit.) |
| Boiling point |
5425 °C (lit.) |
| Density |
16.69 g/cm3 (lit.) |
| bulk density |
500kg/m3 |
| vapor pressure |
<0.01 mm Hg ( 537.2 °C) |
| storage temp. |
no restrictions. |
| solubility |
reacts with HF |
| form |
wire |
| color |
Gray to silver |
| Specific Gravity |
16.6 |
| PH |
7 (20°C in H2O, aqueous suspension) |
| Flame Color |
Blue |
| Resistivity |
13.5 μΩ-cm, 20°C |
| Water Solubility |
very resistant to attack by acids except HF, resistant to alkali solutions [KIR83] |
| Electrical Conductivity |
7.7× 106S/m |
| Thermal Conductivity |
57 W/(m·K) |
| Merck |
13,9143 |
| Exposure limits |
ACGIH TLV-TWA:0.5 ppm(2.5 mg/m3);TLV-CEILING:2 ppm (Skin)
OSHA PEL-TWA:5 mg/m3
NIOSH REL-TWA:5 mg/m3;REL-STEL:10 mg/m3;REL-Ceiling:6 ppm(5 mg/m3);REL-IDLH:30 ppm(250 mg/m3) |
| Stability |
Stable. Powder is very flamable. |
| InChI |
1S/Ta |
| InChIKey |
GUVRBAGPIYLISA-UHFFFAOYSA-N |
| SMILES |
[Ta] |
| LogP |
-1 at 20℃ |
| Hardness, Vickers |
90 |
| Modulus of Elasticity |
179 GPa |
| Poissons Ratio |
0.35 |
| Shear Modulus |
69.0 GPa |
| Hardness, Brinell |
95, Converted from Vickers for 3000 kg load/10 mm ball Brinell test. |
| Hardness, Rockwell A |
35, Converted from Vickers. |
| Hardness, Rockwell B |
51, Converted from Vickers. |
| Vickers Microhardness |
70 - 80, Electron beam melted, cold rolled, then annealed at 1200°C |
| Hardness, Rockwell C |
12, Converted from Vickers. |
| CAS DataBase Reference |
7440-25-7(CAS DataBase Reference) |
| EPA Substance Registry System |
Tantalum (7440-25-7) |
