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Helium Gas Electronic Gases He

Helium is a colorless, odorless and tasteless erotic gas at normal temperature and pressure. Does not burn and does not support combustion. Non-toxic per se, but high concentrations of helium can the oxygen content in the air is reduced, causing suffocation.
Availability:
Quantity:
  • 7440-59-7

  • OEM/ODM

Technical Indicators

Components/Impurities

Pure helium/4.0N

High purity helium/5.0N

Ultrapure Helium/6.0N

Helium content

99.99%

99.999%

99.9999%

Hydrogen H2

≤7.0ppm

≤1.0ppm

≤0.1ppm

Ne

≤40ppm

≤4.0ppm

≤1.0ppm

Oxygen O2 + Argon Ar

≤5.0ppm

≤1.0ppm

≤0.1ppm

nitrogen N2

≤25ppm

≤2.0ppm

≤0.1ppm

carbon monoxide CO

≤1.0ppm

≤0.5ppm

≤0.1ppm

carbon dioxide CO2

≤1.0ppm

≤0.5ppm

≤0.1ppm

Total Carbon (Methane) THC

≤1.0ppm

≤0.5ppm

≤0.1ppm

H2O

≤20ppm

≤3.0ppm

≤0.2ppm


The Packing

Type of cylinder

Gas pressure

Gas volume

High purity carbon dioxide

50L cylinder

19.5+0.5MPa

10000L

1.65KG

40L cylinder

14.5MPa

5800L

0.975KG

1OL cylinder

10MPa

1000L

0.165KG

4L cylinder

10MPa

400L

0.06KG

Tube bundle tanker (TT)

20MPa

5000m3

825KG

Cylinder interface: QF-2, PX-32 external thread/internal thread, thread outlet G5/8 (outer diameter 22.911, number of teeth It is 14 teeth/inch, the pitch is 1.814 mm, the tooth height is 1.162, and the small diameter is 20.587)CGA580


Transport information

Transportation information

Chemical symbol

He

CAS No.

7440-59-7

DOT Shipping Class

non-combustible gas

DOT tags

non-combustible gas

Canadian Shipping Classification

2.2

Substance Identification (S) No.

1046

UN No.

UN 1046

Main hazards

high pressure compression, asphyxiation

Toxicity (TLV):

asphyxia

Explosive Limits (Toxic)

non-combustible gas

Smell

none


Physical properties

Physical properties

Chemical name

He

Molecular weight

4.0026

Melting point (2555kPa)

-272.1℃

Boiling point (101.325kPa)

-268.94℃

Liquid density (4.20K, 100.312kPa)

125.2kg/m3

Gas density (0℃, 101.325kPa)

-0.1785kg/m3

Relative density (gas, 0℃, 101.325KPa)

0.318

Specific volume (21.1℃, 101.325kPa)

6.0304m3/kg

Gas-liquid volume ratio (15℃, 100kPa)

748L/L

Critical temperature

-268℃

Critical pressure

229kPa

Critical density

69.3kg/m3

Compression factor

Temperature(℃)/Pressure

100kPa 1000kPa 10000kPa

10℃

1.0005 1.0049 1.0487

50℃

1.0004 1.0043 1.0429

Heat of fusion (1.2k, 2555kPa)

0.0836kJ/kg

Heat of vaporization (-268.926℃, 101.325kPa)

20.42kJ/kg

Specific heat capacity (gas, 25℃, 101.325kPa)

Cp=5238.3J/(kg • K)


Cv=3213.7J/(kg • K)

Specific heat ratio (gas, 25℃, 101.325kPa)

Cp/Cv=1.63

Vapor pressure (0.5k)

0.0000022kPa

(2.0k)

3.17kPa

(5.0k)

197.1kPa

Viscosity (0℃, 101.325kPa)

0.01864mPa • S

(Liquid, 3.0K)

0.0033mPa • S

Surface tension (4.2K)

0.096mN/m

Thermal conductivity (101.325kPa, 0℃) (liquid, 2.4K)

0.1426w/(m•K) 0.01883w/(m•K)

Refractive index (gas, 0℃, 101.325kPa)

1.000035


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