*** Welcome to piglix ***

Nitric Oxide

Nitric oxide
Skeletal formula of nitric oxide with bond length
Skeletal formula showing three lone pairs and one unpaired electron
Space-filling model of nitric oxide
Names
IUPAC name
Nitric oxide
Systematic IUPAC name
Oxidonitrogen(•) (additive)
Other names
Nitrogen monoxide
Nitrogen(II) oxide
Identifiers
10102-43-9 YesY
3D model (Jmol) Interactive image
3DMet B00122
ChEBI CHEBI:16480 YesY
ChEMBL ChEMBL1200689 N
ChemSpider 127983 YesY
DrugBank DB00435 YesY
ECHA InfoCard 100.030.233
EC Number 233-271-0
451
2509
KEGG D00074 YesY
PubChem 145068
RTECS number QX0525000
UNII 31C4KY9ESH YesY
UN number 1660
Properties
NO
Molar mass 30.01 g·mol−1
Appearance Colourless gas
Density 1.3402 g dm−3
Melting point −164 °C (−263 °F; 109 K)
Boiling point −152 °C (−242 °F; 121 K)
0.0098 g/100ml (0 °C)
0.0056 g/100ml (20 °C)
1.0002697
Structure
linear (point group Cv)
Thermochemistry
210.76 J K−1 mol−1
91.29 kJ mol−1
Pharmacology
R07AX01 (WHO)
Inhalation
Pharmacokinetics:
good
via pulmonary capillary bed
2–6 seconds
Hazards
Safety data sheet External MSDS
Oxidizing Agent O Toxic T
R-phrases R8, R23, R34, R44
S-phrases (S1), S17, S23, S36/37/39, S45
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g., fluorine Special hazard OX: Oxidizer. E.g., potassium perchlorateNFPA 704 four-colored diamond
Lethal dose or concentration (LD, LC):
315 ppm (rabbit, 15 min)
854 ppm (rat, 4 hr)
320 ppm (mouse)
2500 ppm (mouse, 12 min)
Related compounds
Related nitrogen oxides
Dinitrogen pentoxide

Dinitrogen tetroxide
Dinitrogen trioxide
Nitrogen dioxide
Nitrous oxide
Nitroxyl (reduced form)
Hydroxylamine (hydrogenated form)

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
Infobox references

Dinitrogen tetroxide
Dinitrogen trioxide
Nitrogen dioxide
Nitrous oxide
Nitroxyl (reduced form)
Hydroxylamine (hydrogenated form)

Nitric oxide (nitrogen oxide, nitrogen monoxide) is a molecular, chemical compound with chemical formula of ·NO. One of several oxides of nitrogen, it is a colorless gas under standard conditions. Nitric oxide is a free radical—i.e., its bonding structure includes an unpaired electron, represented by the dot (·) on the nitrogen atom—and it is in the class of heteronuclear diatomic molecules that are of historic theoretical interest (for the insights they gave in formulating early modern theories of bonding). It is a particularly important intermediate in the chemical industry. In addition, some is unavoidably produced during combustion of fossil fuels in power plants and automobile engines, with excess being created when more air or higher temperatures are present than needed for efficient and complete combustion of the fuel. It is also produced naturally by the extremely high air temperatures produced along the path of lightning in thunderstorms.


...
Wikipedia

...