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Nitrogen

Also known as Nitrogen gas, Molecular nitrogen, Dinitrogen

Nitrogen chemical structure, N2, CAS 7727-37-9
2D chemical structure

Key facts

What buyers check first

Appearance
Colorless gas
Melting point
-210 °C
Boiling point
-195.8 °C
Density
Critical density: 0.311 g/cm³, heat of dissociation of nitrogen molecule (N2): 225.1 kca…
Solubility
In water, 1.81 × 10⁺⁴ mg/L at 21 °C
HS code
280430
Category
Metals, alloys and elements
UN number
UN 1066
Illustrative photo, a bundle of gas cylinders on a manifold in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Nitrogen?

Plain description, key identifiers and synonyms

Dinitrogen is an elemental molecule consisting of two trivalently-bonded nitrogen atoms. It has a role as a member of food packaging gas and a food propellant. It is a gas molecular entity, an elemental molecule and a diatomic nitrogen. It is a conjugate base of a diazynium.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
molecular nitrogen
CAS number
7727-37-9 CAS number cross-checkedOther or deprecated CAS: 13966-04-6
EC number
231-783-9
Molecular formula
N2
UNII
N762921K75
INCI name
NITROGEN
InChIKey
IJGRMHOSHXDMSA-UHFFFAOYSA-N
InChI
InChI=1S/N2/c1-2
SMILES (canonical and isomeric)
N#N

Synonyms

  • Nitrogen gas
  • Molecular nitrogen
  • Dinitrogen
  • MOL Nitrogen
  • Nitrogeno
  • Nitrogen (n2)
  • INS NO.941
  • Diazyne
  • Nitrogen Nf
  • Nitrogen, NF
  • Nitrogen Compressed
  • Nitrogen, Refrigerated
  • NITROGEN Compressed, NF
  • Nitrogen C70f6047-a0cb-4f70-aa3a-78acd681efc3
  • Nitrogen-14
  • nitrogen molecule
  • Diatomic nitrogen
  • Nitrogen, liquid
  • N in Steel
  • N in Stainless steel
  • Azote
  • Nitrogen (liquified)
  • Liquid Nitrogen
  • Nitrogen, elemental
  • Nitrogen, compressed
Show all 27 synonyms
  • Nitrogen (JP18/NF)
  • STEEL, N

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless gasexp.
Odour
Odorless gasexp.
Taste
Tastelessexp.
Melting point
-210 °Cexp.
Boiling point
-195.8 °Cexp.
Density
Critical density: 0.311 g/cm³, heat of dissociation of nitrogen molecule (N2): 225.1 kcal/moleexp.
Solubility
In water, 1.81 × 10⁺⁴ mg/L at 21 °Cexp.
Vapour pressure
-236 °C at 1Pa (solid), -232 °C at 10Pa (solid), -226.8 °C at 100Pa (solid), -220.2 °C at 1kPa (solid), -211.1 °C at 10kPa (solid), -195.9 °C at 100kPa (N2)exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
28.01 g/molcalc.
Exact mass
28.0061 Dacalc.
LogP (octanol/water)
0.03calc.
Topological polar surface area
47.58 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
2calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS04: Gas under pressure
Gas under pressure
030NFPA 704 rating

Hazard statements

  • H280Contains gas under pressure, may explode if heated.
  • H281Contains refrigerated gas, may cause cryogenic burns or injury.
Precautionary statements (4)
  • P282Wear cold insulating gloves and either face shield or eye protection.
  • P336 + P317Thaw frosted parts with lukewarm water. Do not rub affected area. Get medical help.
  • P403Store in a well-ventilated place.
  • P410 + P403Protect from sunlight. Store in a well-ventilated place.
UN number
UN 1066
Transport hazard class
2.2

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Nitrogen suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 113 suppliers
30 of 30 offers

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Where suppliers are based

113 suppliers in 26 countries

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Nitrogen price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

In manufacturing of ammonia, nitric acid, nitrates, cyanides, etc, in manufacturing explosives, in filling high-temperature thermometers, incandescent bulbs, to form an inert atmosphere for preservation of materials, for use in dry boxes or glove bags. Liquid nitrogen in food-freezing processes, in the laboratory as a coolant. Pharmaceutic aid (air displacement).

Production of ammonia, acrylonitrile, nitrates, cyanamide, cyanides, nitrides, manufacture of explosives, inert gas for purging, blanketing, and exerting pressure, electric and electronic industries, in-transit food refrigeration and freeze drying, pressurizing liquid propellants, quick-freezing foods, chilling in aluminum foundries, bright annealing of steel, cryogenic preservation, food antioxidant, source of pressure in oil wells, inflating tires, component of fertilizer mixtures.

In metallurgy, nitrogen is an alloy constituent and is used for heat treatment and as a scavenging and protective gas.

Industrial uses: Oxidizing agent.

Use classes: Uncategorized, Safer Chemical Classes, Food additives, Cosmetics.

Cosmetic ingredient, INCI name NITROGEN(propellant)

Roles

  • additive
  • antidepressant
  • antifungal agent
  • antimicrobial agent
  • antineoplastic agent
  • antipsychotic agent
  • antiviral agent
  • cardiovascular drug
  • central nervous system depressant
  • central nervous system drug
  • food additive
  • food component
  • food packaging gas
  • food propellant
  • pharmaceutical
  • physiological role
  • propellant
  • psychotropic drug
  • tranquilizing drug

Functional uses

  • Antioxidant
  • Processing aids not otherwise specified
  • Propellants, non-motive (blowing agents)
  • Soil amendments

Cosmetic functions

  • Propellant

Pharmacology

Nitrogen is an element with atomic symbol N, atomic number 7, and atomic weight 14.01.

How it is made

Cryogenic Air Separation: This method has been in commercial use for the production of nitrogen since the beginning of this century. Most nitrogen is produced in large tonnage cryogenic distillation plants with oxygen and argon as coproducts. The nitrogen and oxygen are either utilized directly in gaseous form at adjacent industrial facilities with distribution by pipeline, or some or all is liquified to enable distribution and storage in vacuum-insulated vessels.

Read more

The delivered liquid nitrogen is then used directly or vaporized as needed or is vaporized and stored under pressure in cylinders.

PSA (pressure swing adsorption) systems operate on the principle of reversible selective adsorption of oxygen on a carbon molecular sieve (CMS). ... Air is compressed, filtered, cooled to remove excess moisture, and passed alternately through two beds of CMS. Oxygen, carbon dioxide, and water vapor are selectively adsorbed in the CMS matrix. When one bed is saturated with oxygen, the air flow is diverted to the second. The first bed is depressurized to atmosphere, releasing the adsorbed oxygen, carbon dioxide, and water vapor and the process is repeated. Product nitrogen is collected in a nitrogen receiver and is available at ca 690 kPa (100 psig). Atmospheric argon is concentrated in the product nitrogen.

Membrane Permeation: The use of hollow-fiber polymeric membranes for air separation is a newer technology, commercially viable since the early 1980s.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels
  • Food additive

United States

  • Safer Choice ingredient list (USA)
  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Nitrogen is traded under.

HS 2804.30Exact HS code

Nitrogen

World exports in 2024
$245M
−17.2% vs 2023, imports $263M
2019 to 2024
Top exporters
  1. Belgium17.4%
  2. United States13.8%
  3. Germany10.5%
Top importers
  1. Netherlands23.2%
  2. Germany11.9%
  3. Slovakia4.9%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Nitrogen is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Nitrogen, based on the data on this page

What is Nitrogen?

Dinitrogen is an elemental molecule consisting of two trivalently-bonded nitrogen atoms. It has a role as a member of food packaging gas and a food propellant. It is a gas molecular entity, an elemental molecule and a diatomic nitrogen. It is a conjugate base of a diazynium.

What is the CAS number of Nitrogen?

The CAS registry number of Nitrogen is 7727-37-9. Other or deprecated CAS numbers: 13966-04-6.

What is the molecular formula and weight of Nitrogen?

The molecular formula of Nitrogen is N2 and its molar mass is 28.01 g/mol.

What is Nitrogen used for?

In manufacturing of ammonia, nitric acid, nitrates, cyanides, etc, in manufacturing explosives, in filling high-temperature thermometers, incandescent bulbs, to form an inert atmosphere for preservation of materials, for use in dry boxes or glove bags.

Is Nitrogen hazardous?

Nitrogen carries the GHS signal word "Warning". Main hazards: contains gas under pressure, may explode if heated, contains refrigerated gas, may cause cryogenic burns or injury. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Nitrogen?

Nitrogen is usually classified under HS code 280430 (Nitrogen). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Nitrogen?

CompoundList lists 113 suppliers of Nitrogen in South Korea, United States, India, China and 22 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Nitrogen in India?

13 suppliers in India list Nitrogen on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Nitrogen?

Suppliers quote Nitrogen on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Nitrogen

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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