He
Industrial & Specialty Gases
Helium (Ultra-Pure)
Helium is the lightest noble gas with exceptional thermal and electrical properties. Essential for cryogenics, MRI systems, and semiconductor equipment.
Atomic #
2
Atomic Wt
4.003
CAS #
7440-59-7
Purity
99+%
Available Forms
Compressed gas
Liquid helium
Specialty cylinders
Purity Grades
99.999%
99.9999%
99.99999%
Applications
Semiconductor
- ✓Cooling
- ✓Process gas
Aerospace
- ✓Propellant purge
Technical Specifications
| Boiling Point | -268.9°C |
| Density (gas @ STP) | 0.1785 kg/m³ |
| Thermal Conductivity | 142 mW/m·K @ 273K |
| Inertness | Completely inert |
| Price | Premium noble gas |
Storage Requirements
Store in appropriately designed containers. Requires special handling.
Packaging Options
- •High-purity cylinders
- •Liquid dewar
- •Specialized containers
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