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NIOBIUM Structure

NIOBIUM

Chemical Properties

Melting point 2468 °C (lit.)
Boiling point 4742 °C (lit.)
Density  8.57 g/mL at 25 °C (lit.)
storage temp.  -20°C
solubility  insoluble in acid solutions
form  wire
color  Silver-gray
Specific Gravity 8.57
Resistivity 13-16 μΩ-cm, 20°C
Water Solubility  Insoluble in water.
Merck  13,6584
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. Incompatible with strong bases, strong oxidizing agents, halogens, oxygen.
CAS DataBase Reference 7440-03-1(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 05175J654G
EPA Substance Registry System Niobium (7440-03-1)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H228
Precautionary statements P210-P240-P241-P280-P370+P378
Hazard Codes  F,Xi,C
Risk Statements  17-36/37/38-40-34-20/21/22
Safety Statements  17-36-26-6-45-36/37/39-27
RIDADR  UN 1383 4.2/PG 1
WGK Germany  -
RTECS  QT9900000
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  8112993090
Toxicity LD50 intraperitoneal in mouse: > 10gm/kg
NFPA 704:
0
4 0

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