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Chemical Name:
Azote;Nitro;Nitrito;NA 1067;NITRICDIOXIDE;Nitrogen oxide;Oxoazane oxide;Stikstofdioxyde;NITROGEN DIOXIDE;Stickstoffdioxid
Molecular Formula:
NO2 *
Formula Weight:
MOL File:


Melting point:
−11 °C(lit.)
Boiling point:
21 °C(lit.)
2.62 g/mL at 25 °C(lit.)
vapor density 
1.58 (21 °C, vs air)
vapor pressure 
14.33 psi ( 20 °C)
CAS DataBase Reference
10102-44-0(CAS DataBase Reference)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  T+,O
Risk Statements  26-34-8
Safety Statements  9-26-28-36/37/39-45
RIDADR  UN 1067 2.3
WGK Germany  1
RTECS  QX1575000
HazardClass  2.3
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H270 May cause or intensify fire; oxidizer Oxidising gases Category 1 Danger P220, P244, P370+P376, P403
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:
P220 Keep/Store away from clothing/…/combustible materials.
P244 Keep reduction valves free from grease and oil.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

NITROGEN DIOXIDE Chemical Properties,Uses,Production


Intermediate in nitric and sulfuric acid production. Used in the nitration of organic Compounds and explosives, in the manufacture of oxidized cellulose Compounds (hemostatic cotton). Has been used to bleach flour. Proposed as oxidizing agent in rocket propulsion. See also: Sisler, "Reactions in Liquid Dinitrogen Tetroxide," J. Chem. Educ. 34, 555 (1957).

General Description

A reddish brown gas or yellowish-brown liquid when cooled or compressed. Shipped as a liquefied gas under own vapor pressure. Vapors are heavier than air. Toxic by inhalation (vapor) and skin absorption. Noncombustible, but accelerates the burning of combustible materials. Cylinders and ton containers may not be equipped with a safety relief device.

Air & Water Reactions

Combines with oxygen to form NITROGEN DIOXIDE, a brown gas that is deadly poisonous [Merck 11th ed. (1989]. Decomposes in water to form nitric acid and nitric oxide, reacts with alkalis to form nitrate and nitrites [Merck 11th ed. 1989]. The liquid nitrogen oxide is very sensitive to detonation, in the presence of water.

Reactivity Profile

NITROGEN DIOXIDE (nitrogen peroxide) is a strong oxidizing agent. Powdered aluminum burns in the vapor of carbon disulfide, sulfur dioxide, sulfur dichloride, nitrous oxide, nitric oxide, or nitrogen peroxide [Mellor 5:209-212. 1946-47]. Boron trichloride reacts energetically with nitrogen peroxide, phosphine, or fat and grease [Mellor 5:132. 1946-47]. Nitrogen peroxide and acetic anhydride reacted to form tetranitromethane, but resulted in an explosion [Van Dolah 1967]. Nitrogen peroxide forms explosive mixtures with incompletely halogenated hydrocarbons [Chem. Eng. News 42(47):53. 1964]. During an experiment to produce lactic acid by oxidizing propylene with nitrogen peroxide, a violent explosion occurred. These mixtures (olefins and nitrogen peroxide) form extremely unstable nitrosates or nitrosites [Comp. Rend. 116:756. 1893]. Contact of very cold liquefied gas with water may result in vigorous or violent boiling of the product and extremely rapid vaporization due to the large temperature differences involved. If the water is hot, there is the possibility that a liquid "superheat" explosion may occur. Pressures may build to dangerous levels if liquid gas contacts water in a closed container [Handling Chemicals Safely 1980]. Corrosive to steel when wet, but may be stored in steel cylinders when moisture content is 0.1% or less.

Health Hazard

Severe exposures may be fatal. Contact may cause burns to skin and eyes. Contact with liquid may cause frostbite. NITROGEN DIOXIDE was reported to react with blood to form methemoglobin. The lowest lethal human inhalation dose has been reported at 200 ppm/1 min.

NITROGEN DIOXIDE Preparation Products And Raw materials

Raw materials

Preparation Products


Global( 23)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Riedel-de Haen AG --
-- United States 6180 87
-- Switzerland 6437 91
DuPont Specialty Colorants & Additives --
-- United States 1235 87
American Gas & Chemical Co. Ltd. --
-- United States 11 64
-- United States 6108 54
Guangzhou WeiBo Chemical Co., Ltd. --
-- China 6412 67
Service Chemical Inc. --
-- Germany 6823 71
Liaoning TianHe Fine Chemicals Co., Ltd. --
-- China 30 69
SKC Inc. --
-- United States 1513 76
Camida --
-- Europe 3807 71

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