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HELIUM Structure

HELIUM

Chemical Properties

Melting point -272.2 °C(lit.)
Boiling point -268.934 °C(lit.)
Density  0.1785(0℃)
vapor density  0.14 (vs air)
solubility  slightly soluble in H2O; insoluble in ethanol
form  gas
color  colorless
Odor at 100.00?%. odorless
Water Solubility  8.61mL/1000g H2O (101.32kPa, 0°C) [KIR78]; Henry’s law constants, k×10?4: 9.856 (104°C), 6.739 (149.4°C), 2.524 (250.6°C), 1.796 (275.1°C) [POT78]
Merck  13,4645
Dielectric constant 1.0(-269℃)
Stability Stable; extremely unreactive.
LogP 0.280
CAS DataBase Reference 7440-59-7(CAS DataBase Reference)
EPA Substance Registry System Helium (7440-59-7)

Safety Information

Safety Statements  9
RIDADR  UN 1046 2.2
WGK Germany  3
RTECS  MH6520000
4.5-31
DOT Classification 2.2 (Nonflammable gas)
HazardClass  2.2
Hazardous Substances Data 7440-59-7(Hazardous Substances Data)

MSDS

Usage And Synthesis

Preparation Products And Raw materials

HELIUM Supplier

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