CompoundList
Sign in
Nitrates and nitrites

Nitrogen dioxide

Also known as Nitrogen peroxide, Dioxide, Nitrogen, Peroxide, Nitrogen

CAS 10102-44-0Formula NO2Molar mass 46.01 g/molEC 233-272-6
GHS signal word: Danger. Pictograms: Oxidiser, Gas under pressure, Corrosive, Acute toxicity (severe) 25 suppliers listed
Get quotes Compare 25 suppliers
Nitrogen dioxide chemical structure, NO2, CAS 10102-44-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Red to brown gas above 21.1 °C, brown liquid below 21.1 °C, colorless solid at approx -1…
Melting point
-9.3 °C
Boiling point
21.1 °C
Density
Relative density (water = 1): 1.45 (liquid)
Solubility
Solubility in water: reaction
HS code
283410
Category
Nitrates and nitrites
UN number
UN 1067
Illustrative photo, a small gas cylinder with a regulator in a lab on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Nitrogen dioxide?

Plain description, key identifiers and synonyms

Nitrogen Dioxide is found in the atmosphere as a key ingredient in photochemical formation of smog and acid rain, Nitrogen Dioxide is a poisonous gas that forms during combustion. Toxic at high concentrations, it reacts with moisture in the air to form nitric acid, highly corrosive and hazardous to plants and animals. (NCI04)

Identifiers

Registry numbers, names and line notations, tap to copy

CAS number
10102-44-0 CAS number cross-checked
EC number
233-272-6
Molecular formula
NO2
MDL number
MFCD00085341
InChIKey
JCXJVPUVTGWSNB-UHFFFAOYSA-N
InChI
InChI=1S/NO2/c2-1-3
SMILES (canonical and isomeric)
N(=O)[O]

Synonyms

  • Nitrogen peroxide
  • Dioxide, Nitrogen
  • Peroxide, Nitrogen
  • Nitrogen oxide (NO2)
  • Azoto
  • Peroxyde d' azote
  • Dioxido de nitrogeno
  • Nitrogen peroxide, liquid
  • Nitrogen dioxide (liquid)
  • Nitrogen dioxide, liquefied
  • Nitrito
  • Nitro
  • Nitrogen dioxide (NO2)
  • RCRA waste number P078
  • Stickstoffdioxid
  • Stikstofdioxyde
  • Dioxo-lambda~5~-azanyl
  • Nitrogen dioxide, >=99.5%

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
Red to brown gas above 21.1 °C, brown liquid below 21.1 °C, colorless solid at approx -11 °Cexp.
Odour
Irritating odorexp.
Melting point
-9.3 °Cexp.
Boiling point
21.1 °Cexp.
Density
Relative density (water = 1): 1.45 (liquid)exp.
Solubility
Solubility in water: reactionexp.
Vapour pressure
400 MM HG @ 80 °Cexp.

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
46.01 g/molcalc.
Exact mass
45.9929 Dacalc.
LogP (octanol/water)
0.1calc.
Topological polar surface area
49.33 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
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
Danger
GHS03: Oxidiser
Oxidiser
GHS04: Gas under pressure
Gas under pressure
GHS05: Corrosive
Corrosive
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
030NFPA 704 rating

Hazard statements

  • H270May cause or intensify fire, oxidiser.
  • H314Causes severe skin burns and eye damage.
  • H330Fatal if inhaled.
Precautionary statements (20)
  • P220Keep away from clothing and other combustible materials.
  • P244Keep valves and fittings free from oil and grease.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P376In case of fire: Stop leak if safe to do so.
  • P403Store in a well-ventilated place.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1067
Transport hazard class
2.3

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 dioxide suppliers

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

All 25 suppliers
25 of 25 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

25 suppliers in 12 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Nitrogen dioxide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Intermediate in nitric acid and sulfuric acid production. Has been used to bleach flour, used in nitration of organic cmpounds and explosives, in the manufacture of oxidized cellulose compounds (hemostatic cotton). Proposed as oxidizing agent in rocket propulsion.

Production of nitric acid, nitrating agent, oxidizing agent, catalyst, oxidizer for rocket fuels,,polymerization inhibitor for acrylates.

Chemical intermediate (captive) for nitric acid, catalyst for sulfuric acid (chamber process), oxidizing agent for rocket fuels, calibration gas.

Industrial uses: Processing aids not otherwise specified.

Pharmacological actions

  • Oxidants, Photochemical

How it is made

By oxidation of nitric acid.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 007-002-00-0[1]

United States

  • 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 dioxide is traded under.

HS 2834.10Indicative HS code

Nitrites

World exports in 2024
$64.9M
−6.3% vs 2023, imports $101M
2019 to 2024
Top exporters
  1. China33.8%
  2. India * partner reported30.0%
  3. United States11.3%
Top importers
  1. United States14.9%
  2. Netherlands10.2%
  3. Canada6.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Nitrogen dioxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Nitrogen dioxide?

Nitrogen Dioxide is found in the atmosphere as a key ingredient in photochemical formation of smog and acid rain, Nitrogen Dioxide is a poisonous gas that forms during combustion. Toxic at high concentrations, it reacts with moisture in the air to form nitric acid, highly corrosive and hazardous to plants and animals.

What is the CAS number of Nitrogen dioxide?

The CAS registry number of Nitrogen dioxide is 10102-44-0.

What is the molecular formula and weight of Nitrogen dioxide?

The molecular formula of Nitrogen dioxide is NO2 and its molar mass is 46.01 g/mol.

What is Nitrogen dioxide used for?

Intermediate in nitric acid and sulfuric acid production. Has been used to bleach flour, used in nitration of organic cmpounds and explosives, in the manufacture of oxidized cellulose compounds (hemostatic cotton). Proposed as oxidizing agent in rocket propulsion.

Is Nitrogen dioxide hazardous?

Nitrogen dioxide carries the GHS signal word "Danger". Main hazards: may cause or intensify fire, oxidiser, causes severe skin burns and eye damage, fatal if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Nitrogen dioxide?

Nitrogen dioxide is usually classified under HS code 283410 (Nitrites). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Nitrogen dioxide?

CompoundList lists 25 suppliers of Nitrogen dioxide in United States, India, China, Australia and 8 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 dioxide in India?

5 suppliers in India list Nitrogen dioxide 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 dioxide?

Suppliers quote Nitrogen dioxide 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 dioxide

Get quotes for Nitrogen dioxide

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Nitrogen dioxide
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Nitrogen dioxide with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/nitrogen-dioxide-10102-44-0" title="Nitrogen dioxide structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Nitrates and nitrites or HS code 283410

25 suppliers
Free quotes, contact stays private
Get quotes