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Germanium Structure

Germanium

Chemical Properties

Melting point 937 °C (lit.)
Boiling point 2830 °C (lit.)
Density  5.35 g/mL at 25 °C (lit.)
vapor pressure  0Pa at 25℃
storage temp.  Flammables area
solubility  insoluble in H2O, dilute acid solutions, alkaline solutions
form  powder
Specific Gravity 5.35
color  Silver
Resistivity 53000 μΩ-cm, 20°C
Water Solubility  insoluble H2O, HCl, dilute alkali hydroxides; attacked by aqua regia [MER06]
Crystal Structure Cubic, Diamond Structure - Space Group Fd3m
Merck  13,4419
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. Slightly soluble in strong acids. Incompatible with strong oxidizing agents.
LogP 4.14 at 20℃
CAS DataBase Reference 7440-56-4(CAS DataBase Reference)
FDA UNII 00072J7XWS
NIST Chemistry Reference Germanium(7440-56-4)
EPA Substance Registry System Germanium (7440-56-4)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H228-H361-H373-H410
Precautionary statements P201-P202-P210-P240-P273-P308+P313
Hazard Codes  F,Xi
Risk Statements  36/37/38-36/38-11
Safety Statements  26-36/39-2
RIDADR  UN 3089 4.1/PG 2
WGK Germany  3
RTECS  LY5200000
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  28053090
Hazardous Substances Data 7440-56-4(Hazardous Substances Data)
NFPA 704:
0
2 0

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