Nitrogen, with the CAS number 7727-37-9, is a colorless, odorless, and tasteless diatomic gas that constitutes approximately 78% of the Earth's atmosphere by volume. It is a non-metal and is classified as a member of Group 15 of the periodic table. Nitrogen is relatively inert due to its strong triple bond in the N₂ molecule, making it less reactive under standard conditions. This inertness allows it to serve as a protective atmosphere in various industrial processes and storage applications. Nitrogen is essential for life, as it is a key component of amino acids, proteins, and nucleic acids. It can exist in various forms, including liquid nitrogen, which is used as a cryogenic agent. Nitrogen compounds, such as ammonia and nitrates, play crucial roles in agriculture and biological systems. While nitrogen itself is non-toxic, certain nitrogen oxides can be harmful pollutants. Overall, nitrogen is a vital element in both environmental and biological contexts, with significant applications in industry and research.

Nitrogen makes up the major portion of the atmosphere
(78.08 percent by volume, 75.5 percent
by weight). It is a colorless, odorless,
tasteless, nontoxic, almost totally inert gas, and
is colorless as a liquid. Nitrogen is nonflammable,
will not support combustion, and is not life
supporting. It combines with some of the more
active metals such as lithium and magnesium to
form nitrides, and at high temperatures it will
also combine with hydrogen, oxygen, and other
elements. It is used as an inert protection against
atmospheric contamination in many nonwelding
applications. Nitrogen is only slightly soluble in
water and most other liquids, and is a poor conductor
of heat and electricity. As a liquid at
cryogenic temperatures it is nonmagnetic. It is
shipped as a nonliquefied gas at pressures of
2000 psig (13 790 kPa) or above, and also as a
cryogenic fluid at pressures and temperatures
below 200 psig (1380 kPa) and -261°F
(-163°C).

Nitrogen

7727-37-9: Nitrogen, with the CAS number 7727-37-9, is a colorless, odorless, and tasteless diatomic gas that constitutes approximately 78% of the Earth's atmosphere by volume. It is a non-metal and is classified as a member of Group 15 of the periodic table. Nitrogen is relatively inert due to its strong triple bond in the N₂ molecule, making it less reactive under standard conditions. This inertness allows it to serve as a protective atmosphere in various industrial processes and storage applications. Nitrogen is essential for life, as it is a key component of amino acids, proteins, and nucleic acids. It can exist in various forms, including liquid nitrogen, which is used as a cryogenic agent. Nitrogen compounds, such as ammonia and nitrates, play crucial roles in agriculture and biological systems. While nitrogen itself is non-toxic, certain nitrogen oxides can be harmful pollutants. Overall, nitrogen is a vital element in both environmental and biological contexts, with significant applications in industry and research.

CAS 7727-37-9

Nitrogen