Helium Gas

Specialty Gases

Helium Gas Supplier for New England

Helium Gas

A colorless, odorless, tasteless, inert gas

Helium is a colorless, odorless, and tasteless inert gas which has no toxic properties. A member of the rare gas chemical family, it is 1/7 as heavy as air. Liquid Helium at -452°F is the coldest liquefied gas. Middlesex Gases supplies Liquid Helium to commercial customers in Massachusetts, New Hampshire, Rhode Island, Connecticut and throughout New England.

TECHNICAL INFORMATION
Chemical Symbol He
Molecular Weight 4.003
Specific Volume 96.7 ft3/lb (6.0 m3/kg)
CAS Registry Number 7440-59-7
SHIPPING INFORMATION
DOT Proper Name Helium, Compressed
Hazard Class 2.2
ID Number UN1046
Labels Nonflammable Gas
CYLINDER SIZES AVAILABLE
Std. Cylinder Sizes* Contents Cylinder Pressure (PSIG) CGA Valve Connection
300 291 2640 580
200 217 2200 580
80 73 2200 580
6K 515 6000 677
*Nonstandard cylinder sizes available upon request

SPECIFICATIONS SUBJECT TO CHANGE

Contact Us To Confirm

Additional Information
GradePurityImpuritySpecifications Equipment Recommended
Ultra High Purity
5.0
99.999% O2
THC
H2O
<1 ppm
<0.5 ppm
<1 ppm

3201
N2 Free 5.0 99.999% Oxygen
Moisture
Nitrogen
Total Hydrocarbons
<2 ppm
<2 ppm
<6 ppm
<0.5 ppm

3201
High Purity 4.7 99.997% O2
THC
H2O
<3 ppm
<1 ppm
<3 ppm

3201
Zero 0.5 99.997% THC <0.5 ppm 3201
6K PSIG 99.997% Oxygen
Moisture
<5 ppm
<5 ppm
3800V or 3860TB
This information in no way replaces the Safety Data Sheets (SDS) for use and safety standards. Please refer to the SDS for details.

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