helium

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Names

[ CAS No. ]:
7440-59-7

[ Name ]:
helium

[Synonym ]:
EINECS 231-168-5
helium
MFCD00011031

Chemical & Physical Properties

[ Density]:
0.1785（0ºC）

[ Boiling Point ]:
-268.934ºC(lit.)

[ Melting Point ]:
-272.2ºC(lit.)

[ Molecular Formula ]:
He

[ Molecular Weight ]:
4.00260

[ Flash Point ]:
none

[ Exact Mass ]:
4.00260

[ Vapour density ]:
0.14 (vs air)

[ Stability ]:
Stable; extremely unreactive.

MSDS

Click to get detail MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
MH6520000
CHEMICAL NAME :
Helium
CAS REGISTRY NUMBER :
7440-59-7
LAST UPDATED :
199712
DATA ITEMS CITED :
15
MOLECULAR FORMULA :
He

Safety Information

[ Risk Phrases ]:
R9

[ Safety Phrases ]:
S9

[ RIDADR ]:
UN 1046

[ WGK Germany ]:
3

[ RTECS ]:
MH6520000

[ Hazard Class ]:
2.2

[ HS Code ]:
2804290000

Customs

[ HS Code ]: 2804290000

Related Compounds

  • Helium
  • helium
  • helium-3
  • helium(•1+)
  • helium,neon
  • helium,xenon
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