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Tantalum Structure

Tantalum

Chemical Properties

Melting point 2996 °C (lit.)
Boiling point 5425 °C (lit.)
Density  16.69 g/cm3 (lit.)
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
Resistivity 13.5 μΩ-cm, 20°C
Water Solubility  very resistant to attack by acids except HF, resistant to alkali solutions [KIR83]
Merck  13,9143
Exposure limits ACGIH: TWA 0.5 ppm(2.5 mg/m3); Ceiling 2 ppm (Skin)
OSHA: TWA 3 ppm
NIOSH: IDLH 30 ppm(250 mg/m3); TWA 3 ppm(2.5 mg/m3); Ceiling 6 ppm(5 mg/m3)
Stability Stable. Powder is very flamable.
InChIKey GUVRBAGPIYLISA-UHFFFAOYSA-N
LogP -1 at 20℃
CAS DataBase Reference 7440-25-7(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 6424HBN274
EPA Substance Registry System Tantalum (7440-25-7)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H228
Precautionary statements P210-P240-P241-P280-P370+P378
Hazard Codes  F,Xi,Xn,C
Risk Statements  11-36/37/38-20/21/22-40-34-36/38
Safety Statements  16-26-33-36/37/39-36-45-27-36/37
RIDADR  UN 3089 4.1/PG 2
WGK Germany  -
RTECS  WW5505000
Autoignition Temperature 572 °F
TSCA  Yes
HazardClass  4.1
PackingGroup  II
HS Code  8103909000
Hazardous Substances Data 7440-25-7(Hazardous Substances Data)
IDLA 2,500 mg Ta/m3
NFPA 704:
0
4 0

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