Nitrogen
Also known as Nitrogen gas, Molecular nitrogen, Dinitrogen
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

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 synonymsShow fewer 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.Measured value |
|---|---|
| Odour | Odorless gasexp.Measured value |
| Taste | Tastelessexp.Measured value |
| Melting point | -210 °Cexp.Measured value |
| Boiling point | -195.8 °Cexp.Measured value |
| Density | Critical density: 0.311 g/cm³, heat of dissociation of nitrogen molecule (N2): 225.1 kcal/moleexp.Measured value |
| Solubility | In water, 1.81 × 10⁺⁴ mg/L at 21 °Cexp.Measured value |
| 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.Measured value |
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.Computed value |
|---|---|
| Exact mass | 28.0061 Dacalc.Computed value |
| LogP (octanol/water) | 0.03calc.Computed value |
| Topological polar surface area | 47.58 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 2calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 2calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
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 aidNitrogen suppliers
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Where suppliers are based
113 suppliers in 26 countries
- South Korea48
- United States14
- India13
- China11
- Australia3
- Austria2
- and 20 more countries
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Nitrogen price
Indicative price range per kg from live supplier offers
Suppliers quote this chemical on request. Send one free request and compare quotes side by side.
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.
Industries and functions
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.
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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.
Nitrogen
- Belgium17.4%
- United States13.8%
- Germany10.5%
- Netherlands23.2%
- Germany11.9%
- Slovakia4.9%
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?
What is the CAS number of Nitrogen?
What is the molecular formula and weight of Nitrogen?
What is Nitrogen used for?
Is Nitrogen hazardous?
What is the HS code of Nitrogen?
Where can I buy Nitrogen?
Where can I buy Nitrogen in India?
What is the price of Nitrogen?
Guides for buyers
Practical guides that help when you source, ship or handle Nitrogen
- Guide, SafetyHow to read a safety data sheet in 10 minutesA section by section method to pull the essentials out of any 16 section SDS: identity, hazards, composition, storage, PPE, properties, transport and emergency measures.Read
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, SafetyGHS pictograms, signal words and hazard statements explainedA practical guide to the nine GHS pictograms, the signal words Danger and Warning, H and P statements, and how to read a chemical label in seconds.Read
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