Specialty Gases
Helium Gas Supplier for New England
Helium Gas
A colorless, odorless, tasteless, inert gas
Learn more about Helium gas, a colorless, odorless, 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 and 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
Additional Information
| Grade | Purity | Impurity | Specifications | 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.
