dinitrogen trioxide Property

Melting point:

-103.15°C

Boiling point:

2°C (estimate)

Density 

1.400

solubility 

reacts with H2O

form 

gas

color 

blue solid or liquid (low temperature)

EPA Substance Registry System

Nitrogen trioxide (10544-73-7)

Safety

RIDADR 

2421

HazardClass 

2.3

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H270May cause or intensify fire; oxidizer

H280Contains gas under pressure; may explode if heated

H314Causes severe skin burns and eye damage

Precautionary statements

P220Keep/Store away from clothing/…/combustible materials.

P244Keep reduction valves free from grease and oil.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P363Wash contaminated clothing before reuse.

P370+P376in case of fire: Stop leak if safe to Do so.

P403Store in a well-ventilated place.

P405Store locked up.

P410+P403Protect from sunlight. Store in a well-ventilated place.

P501Dispose of contents/container to..…

dinitrogen trioxide Chemical Properties,Usage,Production

Chemical Properties

blue liquid; used as an oxidant in special fuel systems [HAW93]

Definition

ChEBI: Dinitrogen trioxide is a nitrogen oxide.

General Description

A blue liquid with a sharp, unpleasant chemical odor. Density 1.447 g / cm3. Low-boiling (boiling point 3.5°C) and held as a liquid by compression. Partially dissociates into NO and NO2. Strong irritant to skin, eyes and mucous membranes. Vapors very toxic by inhalation. Used in special purpose fuels. Under prolonged exposure to intense heat the container may rupture violently and rocket.

Reactivity Profile

dinitrogen trioxide is an oxidizing agent. Nonflammable but may cause fires when mixed with combustible materials. Reacts with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). Catalyzes ignition of phosphine gas [Edin. Roy. Soc. 13:88. 1935]. A mixture with caprolactam dissolved in acetic acid is explosive unless effectively cooled. Incompatible with phosphorus, or other reduced materials Reactivity likely to resemble that of nitrogen dioxide and nitrogen tetraoxide.. .

Health Hazard

TOXIC; may be fatal if inhaled or absorbed through skin. Fire will produce irritating, corrosive and/or toxic gases. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Runoff from fire control may cause pollution.

Fire Hazard

Substance does not burn but will support combustion. Vapors from liquefied gas are initially heavier than air and spread along ground. These are strong oxidizers and will react vigorously or explosively with many materials including fuels. May ignite combustibles (wood, paper, oil, clothing, etc.). Some will react violently with air, moist air and/or water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.