High-Purity Helium
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WEB: std-coatings.com
Product Details
Product Names
Ultra-Pure Helium
High-Purity Helium
Helium
Purity
Ultra-Pure Helium: ≥99.9999%
High-Purity Helium: ≥99.999%
Impurity Content (ppm)
| Impurity | Ultra-Pure Helium | High-Purity Helium |
|---|---|---|
| Water (H₂O) | ≤0.5 | ≤3 |
| Oxygen (O₂+Ar) | ≤0.1 | ≤1 |
| Nitrogen (N₂) | ≤0.5 | ≤2 |
| Carbon Monoxide (CO) | ≤0.1 | ≤0.5 |
| Carbon Dioxide (CO₂) | ≤0.1 | ≤0.5 |
| Hydrocarbons (THC) | ≤0.1 | ≤0.5 |
Packaging
Filled in 40L, 49L, 50L steel cylinders, and also available in smaller cylinders of 8-10L upon customer request.
Applications
Helium is widely used in military, scientific research, petrochemical, refrigeration, medical, semiconductor, pipeline leak detection, superconductivity experiments, metal manufacturing, deep-sea diving, precision welding, and optoelectronic product manufacturing.
Safety Information
CAS Number: 7440-59-7.
Physical and Chemical Properties: Colorless and odorless inert gas. Insoluble in water and ethanol. Melting point (℃): -272.1; Boiling point (℃): -268.9; Relative density (water=1): 0.15 (-271℃); Relative density (air=1): 0.14; Saturation vapor pressure (kPa): 202.64 (-268℃); Flash point (℃): Not applicable; Combustion heat (kJ/mol): Not applicable; Critical temperature (℃): -267.9; Critical pressure (MPa): 2.3; Upper and Lower Explosion Limits (v%): Not applicable; Ignition temperature (℃): Not applicable.
Combustion and Explosion Hazards: Non-flammable. Under high heat, the pressure inside the container may increase, posing a risk of rupture and explosion.
Firefighting Methods: Non-flammable. Remove containers from the fire area if possible. Spray water to keep the containers cool until the fire is out. Evacuate people to the upwind side and isolate the contaminated area. Emergency personnel should wear self-contained positive pressure breathing apparatus and general work clothes. Cut off the leak source if possible. Ensure adequate ventilation to disperse the gas. Handle the leaking container properly, repair and inspect before reuse.
Health Hazards: Inert gas, high concentrations can reduce oxygen partial pressure and pose a risk of asphyxiation. Symptoms include increased breathing rate, lack of concentration, ataxia, followed by fatigue, restlessness, nausea, vomiting, coma, convulsions, and potentially death.
First Aid Measures: Inhalation: Quickly move to a fresh air area. Keep the airway clear. If breathing is difficult, administer oxygen. If breathing stops, perform artificial respiration immediately. If breathing and heartbeat stop, perform artificial respiration and external chest compressions immediately.
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