Liquid Helium

High-purity gas contains extremely low levels of impurities, making it ideal for sensitive and precision-driven applications. The quality of a gas is measured by its purity grade, typically indicated with the letter “N” to show the number of nines in its composition (e.g., N5.0 = 99.999%).
Common Uses for High-Purity Gases Include:
Semiconductor manufacturing
Carrier gas in gas chromatography and mass spectrometry
Laboratory and analytical research
Filling weather balloons
Cooling in fibre optic production
Photovoltaic cell (solar panel) manufacturing

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Categories: Helium, High Purity

Technical Specifications

Chemical Formula: He CAS Number: 7440-59-7 Molecular Weight: 4.0026 g/mol Boiling Point: -268.93°C (4.2 K) at 1 atm Freezing Point: Only solidifies under pressure below 25 atmospheres Density (at boiling point): 0.125 g/cm³ Purity Grades Available: 99.999% (Ultra High Purity – UHP) 99.9999% (Research Grade) Appearance: Colourless, Odourless Cryogenic Liquid Phase at Room Temp: Gas Phase at Delivery: Liquid in insulated Dewars or cryogenic tanks Applications MRI Machines & Medical Imaging: Cryogenic cooling of superconducting magnets Scientific Research: Cryogen for particle accelerators, NMR, and quantum computing Aerospace & Defence: Rocket fuel pressurisation and heat transfer applications Semiconductor Manufacturing: Ultra-low temperature processes Laboratories & Cryogenics: Superfluid and superconductivity research Safety Information Hazard Classification: Asphyxiant in high concentrations Flammability: Non-flammable Transport Classification: UN Number: 1963 Shipping Name: Helium, Refrigerated Liquid ADR Class: 2.2 (Non-flammable, non-toxic gas) Incompatibilities: Avoid enclosed or unventilated spaces due to O₂ displacement risk