Ar CAS Number 7440-37-1 UN1951 (refrigerated liquid)
Argon
Ar2|CAS Number 7440-37-1|UN1951(refrigerated liquid)
Calculating the volume or mass of a given amount of liquid
At the boiling point (1atm | 87.3k) Equal to: -185.85 C° || -302.53 F°
The phase diagram of a molecule shows the transition between solid, liquid, and gas phases as a function of temperature and pressure.
GHS04
Gas under pressure
• Liquid argon is stored at approximately −186 °C (−303 °F). Direct contact with skin or eyes can result in severe cold burns and deep tissue damage.
Safety Measures:
• Always wear appropriate Personal Protective Equipment (PPE) such as cryogenic gloves, safety goggles or face shields, and full protective clothing.
• Avoid loose clothing or jewelry that can trap liquid argon.
• In case of skin contact, rinse the affected area with lukewarm water (not hot) and seek immediate medical attention.
• Upon vaporization, liquid argon expands into a large volume of gas, which is heavier than air. In poorly ventilated or low-lying areas, argon gas may displace oxygen, posing a risk of asphyxiation. Symptoms include dizziness, headache, nausea, and loss of consciousness.
Safety Measures:
• Use liquid argon only in well-ventilated environments.
• Install oxygen sensors to monitor atmospheric oxygen levels.
• Evacuate immediately if a gas leak or accumulation is suspected.
• Never enter confined spaces unless oxygen concentration and argon levels have been verified as safe.
• Storing liquid argon in a sealed container can lead to a rapid build-up of internal pressure as it evaporates, posing a risk of explosion.
Safety Measures:
• Never store liquid argon in a closed system without proper pressure relief.
• Use containers equipped with relief valves to safely vent excess pressure.
• When transferring liquid argon, use equipment specifically rated for cryogenic applications and follow all operating procedures carefully.
• Avoid contact between liquid argon and hot surfaces or flammable materials to prevent uncontrolled reactions or pressure surges.
• Superconducting equipment: Liquid argon, with its very low boiling point (about -186°C), is used as an effective coolant for superconducting equipment. Applications include cooling MRI magnets, NMR (nuclear magnetic resonance) machines, and particle accelerators. • Industrial processes: In some industries that require rapid, localized, and intense cooling, liquid argon is used to rapidly reduce the temperature of sensitive components.
Food: Liquid argon is used to super-freeze food. This method prevents damage to the cellular structure of the food by forming very small ice crystals, preserving its texture, color, and quality.
Biological samples: In biological and medical laboratories, liquid argon is used to rapidly freeze cells, tissues, and other biological samples to prevent damage to sensitive structures and preserve their biological properties.
• Cancer treatment: In some modern treatments, liquid argon is used to freeze and destroy cancerous tissues. Using a probe cooled with liquid argon, the target tissue is frozen and then destroyed.
• Treatment of skin lesions: Cryosurgery with liquid argon can be used to treat skin lesions such as warts, moles, keratoses, and benign tumors.
• Studying materials at low temperatures: Liquid argon is used in many physics and materials research as a cooling medium to study the properties of materials in extremely cold conditions.
• Vacuum generation: In some laboratory systems, liquid argon is used to help create a vacuum through the condensation of gases in the chamber.
• Space equipment testing: In simulating the extremely cold conditions of outer space, liquid argon plays an important role in testing the performance of space equipment, satellites, and sensors.
