Basic information
- CAS
10544-73-7- Standard SMILES
O=N[N+](=O)[O-]- InChIKey
LZDSILRDTDCIQT-UHFFFAOYSA-N- Molecular formula
- N2O3
- Average molar mass
- 76.012 g/mol
- Monoisotopic mass
- 75.99089186
Overview
Nitrogen trioxide appears as 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.
Names & identifiers
- Preferred name
- Nitrogen trioxide
- IUPAC
- N-oxonitramide
- English name
- dinitrogen trioxide
- Molecular formula
- N2O3
- Molecular weight
- 76.01
Names & synonyms
Dinitrogen trioxideN-oxonitramideNITROGEN TRIOXIDE10544-73-7Nitrogen oxide (N2O3)Nitrous anhydride16E0524PXIDTXSID7065120CHEBI:29799RefChem:166100DTXCID9032959234-128-5
Show more names
NITROGENSESQUIOXIDENitrogen trioxide: (Dinitrogen trioxide)1,3-Diaza-2,4,5-trioxabicyclo[1.1.1]pentaneTrioxido-1kappa(2)o,2kappao-dinitrogen(N--N)Dinitrogen trioxide (gas) (unlabelled N2O3)
EINECS 234-128-5UN2421UNII-16E0524PXIN2O3Nitrogen trioxide 10% by volume or moreO2NNOSCHEMBL51949DINITROGEN TRIOXIDE [MI]
Database identifiers
- CAS
10544-73-7- PubChem CID
- 61526
- DTXSID
DTXSID7065120- ChEBI
CHEBI:29799- UNII
- 16E0524PXI
- EC Number
- 234-128-5
Properties
Computed structural properties
- XLogP
- -0.1
- Topological polar surface area
- 75.3 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 50.4
Experimental & physicochemical properties
Chemical Classes
Toxic Gases & Vapors -> Oxidizers
Reactive agents - 1st degree
SpringerMaterials PropertiesGibbs energy
Density1.4 @ 2°C
Boiling Point38 °F
Melting Point-101.1 °C
Physical Description
Nitrogen trioxide appears as 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.
"Blue liquid with a sharp, unpleasant chemical odor"; [CAMEO]
Physicochemical properties
- Melting point
- -103.15 °C · -103.15°C
Safety & regulation
GHS classification
GHS Classification
Danger
H270 (100%): May cause or intensify fire; oxidizer [Danger Oxidizing gases]
P220, P244, P260, P262, P264, P270, P271, P280, P284, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P361+P364, P363, P370+P376, P403, P403+P233, P405, P410+P403, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 38 reports by companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Hazards IdentificationToxic/poison by inhalation (TIH/PIH)
Regulatory Information
Chemical: Nitrogen oxide (N2O3)
The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
DOT LabelPoison Gas Oxidizer Corrosive
Fire Hazards
Excerpt from ERG Guide 124 [Gases - Toxic and/or Corrosive - Oxidizing]:
· Substance does not burn but will support combustion.
Health Hazards
Excerpt from ERG Guide 124 [Gases - Toxic and/or Corrosive - Oxidizing]:
· TOXIC and/or CORROSIVE; may be fatal if inhaled or absorbed through skin.
Hazards SummaryDissociates to produce NO and NO2; Strong skin and eye irritant; Contact may cause burns or frostbite; Very toxic by inhalation; [CAMEO] See Nitrogen dioxide.
DOT ID and Guide2421 124
Reactive Group
Chemistry & industry
Uses & manufacturing
UsesUsed in special purpose fuels. [CAMEO]
General Manufacturing InformationNitrogen oxide (N2O3): ACTIVE
Applications
General DescriptionA 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.
Upstream & downstream products
Upstream raw materials
Suppliers2 total
Shaanxi Didu New Materials Co. Ltd+86-86-17392712779 +86-13289823923 · [email protected]
上海宝杨宝欣生物科技有限公司
Related reactions
13 records
Compound notes
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