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Some Unknown Facts about Liquid Nitrogen You Probably Didn’t Know

Liquid nitrogen is so cold that it exists in liquid form. It is useful for cooling and many cryogenic purposes. Here are some underestimated factors about liquid nitrogen and how to handle it safely.

  • It is the liquefied form of element nitrogen that is produced by fractional distillation of liquid air.
  • Like nitrogen gas, it has 2 nitrogen atoms sharing covalent bonds or N2.
  • Many times nitrogen is also denoted as LN, LIN, or LN2.
  • The UN number of nitrogen is 1977.
  • At normal pressure, it boils at 77 K
  • The liquid to gas expansion ratio of nitrogen is 1:694 meaning that the liquid nitrogen boils in such a way to fill a volume with a nitrogen gas rapidly.
  • Nitrogen is odorless, nontoxic, and colorless in nature. It is relatively inert, not flammable at all.
  • Nitrogen gas weighs lighter than air when it reaches the room temperature. It is a tad bit soluble in water.
  • On April 15, 1883, nitrogen was first liquefied by Polish physicist named Zygmunt Wróblewski and Karol Olszewski.
  • Liquid nitrogen is preserved in special insulated containers that are vented to keep the pressure buildup at bay.
  • On the basis of your flask, liquid nitrogen can be stored for a few hours or weeks.

How to Handle Liquid Nitrogen Safely?

  • Liquid nitrogen is so cold that it can cause frostbite upon contact with the living tissue. Always don proper safety gear when handling liquid nitrogen near me to avoid inhaling or touching it of the extremely cold vapor. Always cover and insulate the skin so as to keep your skin at bay from the exposure.
  • As it boils so quickly, the phase change from the liquid gas can evoke a lot of pressure rapidly. Never enclose the liquid nitrogen in sealed container or it may cause explosion.
  • When you add a lot of nitrogen in air, it reduces the relative amount of oxygen. This can cause an asphyxiation risk. Cold nitrogen is denser than the air, so the risk is the gravest near the ground.
  • Always use liquid nitrogen in a well-ventilated place. Liquid nitrogen containers tend to collect oxygen that is condensed from the air. And as the nitrogen evaporates, there is always a risk involved in violent oxidation of the organic matter.

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