- Nitrogen monoxide
A colorless gas.
Manufacture of nitric acid, in bleaching of rayon, stabilizer for propylene, methyl ether.
Registry Numbers and Inventories.
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
Odor Threshold Odor threshold 0.3600 mg/m3
1.27 g/cm3 (20 C)
Solubility in water
0.0188 cp at 25C @ 1 atm
1.0002697 (20 C)
Heat of fusion
Heat of vaporization
Hazards and Protection.
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.
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.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
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.
Will react with water or steam to produce heat and corrosive fumes, can react vigorously with reducing materials. Highly reactive.
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.
When heated to decomposition, it emits highly toxic fumes of nitrogen oxides.
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.
Burns only when heated with hydrogen
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.
When heated to decomp, it emits highly toxic fumes of oxides of nitrogen.
NIOSH REL: TWA 25 ppm (30 mg/m3) OSHA PEL: TWA 25 ppm (30 mg/m3) IDLH 100 ppm
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.
Nausea and abdominal pain may be occur.
May be fatal if inhaled. Causes irritation/burns.
Nitric oxide is a skin irritant.
Inflammation of the eye, not necessarily due to nitric oxide, is likely to occur under conditions where nitrogen dioxide would be formed.
Because nitric oxide is a gas under ambient conditions, oral exposure normally does not occur.
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.
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.
Immediately flush with running water for at least 20 minutes. Effects may be delayed.
USCG CHRIS Code
Std. Transport #