Nitric oxide

  • Nitrogen monoxide
Formula
NO
Structure
Description
A colorless gas.
Uses
Manufacture of nitric acid, in bleaching of rayon, stabilizer for propylene, methyl ether.

Registry Numbers and Inventories.
CAS
10102-43-9
EC (EINECS/ELINCS)
233-271-0
RTECS
QX0525000
RTECS class
Mutagen
UN (DOT)
1660
Merck
12,6674
Beilstein/Gmelin
72187 (G)
RCRA
P076
Swiss Giftliste 1
G-5489
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
NO
Formula mass
30.00
Melting point, °C
-163.6
Boiling point, °C
-151.7
Vapor pressure, mmHg
26000
Vapor density (air=1)
1.04
Odor Threshold Odor threshold 0.3600 mg/m3
Critical temperature
-92.9
Critical pressure
64.6
Density
1.27 g/cm3 (20 C)
Solubility in water
50 g/L
Viscosity
0.0188 cp at 25C @ 1 atm
Refractive index
1.0002697 (20 C)
Heat of fusion
2.3 kJ/mol
Heat of vaporization
13.8 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
Will react with water or steam to produce heat and corrosive fumes, can react vigorously with reducing materials. Highly reactive.
Incompatibilities
Incompatible with aluminum, boron, carbon disulfide, hypochlorite, chromium, fluorine, fuels, hydrocarbons, nitrogen trichloride, ozone, phosphorus, uns-dimethyl hydrazine, uranium, acetic anhydride, ammonia, barium oxide, boron trichloride, methyl chloride, 1,2-dichloroethane, dichloroethylene, ethylene, iron, magnesium, manganese, olefins, potassium, propylene, sodium, sulfur, trichloroethylene, 1,1,1-trichloroethane, uns-tetrachloroethaneand reducing agents. React vigorously with sodium monoxide above 100C Reacts on contact with oxygen at room temperature to form brown gaseous nitrogen dioxide Reacts with alkalis to form nitrates and nitrites.
Decomposition
When heated to decomposition, it emits highly toxic fumes of nitrogen oxides.

Fire.
Fire fighting
Wear positive pressure breathing apparatus and full protective clothing. Move container from fire area if you can do so without risk. Stay away from ends of tanks. Spray cooling water on containers that are exposed to flames until well after fire is out. For massive fire in cargo area, use unmanned hose holder or monitor nozzles; if this is impossible, withdraw from area and let fire burn.For small fires, use dry chemical or carbon dioxide. For large fires, use water spray, fog, or foam.
Fire potential
Burns only when heated with hydrogen
Hazards
Burns only when heated with hydrogen. With carbon disulfide, it reacts explosively with emission of light. When mixed with chlorine monoxide, can be explosive. Explodes on contact with nitrogen trichloride. When mixed with ozone, it will explode. Will react with water or steam to produce heat and corrosive fumes. Reacts vigorously with reducing materials. When heated to decomposition, highly toxic fumes of nitrogen oxides are emitted. May ignite other combustible materials (wood, paper, oil, etc.). Mixture with fuels may explode. Container may explode in heat of fire. Vapor explosion and poison hazard indoors, outdoors or in sewers. Reacts with oxygen to form poisonous nitrogen dioxide.
Combustion products
When heated to decomp, it emits highly toxic fumes of oxides of nitrogen.
Health
3
 
Flammability
0
 
 
Reactivity
0
 
 
Special
O

Health.
Exposure limit(s)
NIOSH REL: TWA 25 ppm (30 mg/m3) OSHA PEL: TWA 25 ppm (30 mg/m3) IDLH 100 ppm
Poison_Class
3
Exposure effects
Dyspnea may develop after a delay of several hours. Fatigue, restlessness, anxiety, mental confusion, lethargy, and loss of consciousness may be noted. With therapeutic use - 1. Paralysis and areflexia were noted in one case of therapeutic dosing with nitric oxide. Effects on newborns were seen in hamsters, mice, and rats. Methemoglobin inducers are considered harmful to the fetus.
   Ingestion
Nausea and abdominal pain may be occur.
   Inhalation
May be fatal if inhaled. Causes irritation/burns.
   Skin
Nitric oxide is a skin irritant.
   Eyes
Inflammation of the eye, not necessarily due to nitric oxide, is likely to occur under conditions where nitrogen dioxide would be formed.

First aid
 
   Ingestion
Because nitric oxide is a gas under ambient conditions, oral exposure normally does not occur.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. Effects may be delayed.
   Eyes
Immediately flush with running water for at least 20 minutes. Effects may be delayed.

Transport.
UN number
1660
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
NTX
 
Std. Transport #
4920112