HELIUM

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.

Symbol(GHS) 

GHS04

Signal word 

Warning

Hazard statements 

H280

Precautionary statements 

P410+P403