Nitrogen, refrigerated liquid (cryogenic liquid)
Colorless odorless, cryogenic liquid. Very cold.
In manufacture of ammonia, nitric acid, nitrates, cyanides, etc & explosives, in filling high temperature thermometers, incandescent bulbs, to form an inert atmosphere for preservation of materials for use in dry boxes or glove bags, pharmaceutic aid (air displacement), liq: in food freezing processes & in laboratory as a coolant.
Registry Numbers and Inventories.
Swiss Giftliste 1
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
Odor Threshold Odor threshold Odorless
0.807 g/cm3 (20 C)
Solubility in water
156.3 mps (-21.5C)
6.6 g/s2 (-183 C)
Partition coefficient, pKow
0.0042424/K (0 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.
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. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Filter cartridge respirators are inadequate.
Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Do not direct water at spill or source of leak. Allow substance to evaporate. Isolate area until gas has dispersed.
Incombustible and unreactive.
Reacts violently in mixture with magnesium powder when a fuse is lit.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Do not use water on material itself. Apply water from as far a distance as possible.
Noncombustible liquiduefied gas.
Containers may explode when heated.
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
Hyperventilation may develop. Vapors may cause dizziness or asphyxiation without warning. On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas.
Frostbite on contact with liquid.
Pain, severe deep burns.
Seek medical assistance.
Remove to fresh air; apply artificial respiration if breathing has stopped; call physician.
If exposed to very cold gas, treat for frostbite; soak in lukewarm water.
If exposed to very cold gas, treat for frostbite burns caused by liquid.
USCG CHRIS Code
Std. Transport #
IMO Gas Code