Product Identification

Product Name

Nitrogen

Synonyms

IMO Gas Code

CAS

7727-37-9

Formula

N2

Molecular Weight

28.01

EINECS

231-783-9

RTECS

QW9700000

RTECS Class

Other

Merck

12,6698

Beilstein/Gmelin

150 (G)

Physical and Chemical Properties

Appearance

Colorless odorless, cryogenic liquid. Very cold.

Solubility in water

Insoluble

Melting Point

-214.4

Boiling Point

-195.86

Vapor Pressure

2710 (-183 C)

Density

0.807 g/cm3 (20 C)

Partition Coefficient

.67

Heat Of Vaporization

5.57 kJ/mol

Usage

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.

Vapor Density

.97

Odor threshold

Odorless

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Remove to fresh air; apply artificial respiration if breathing has stopped; call physician.

Skin

Treat for frostbite; soak in lukewarm water.

Eyes

Treat for frostbite burns caused by liquid.

Handling and Storage

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.

Hazards Identification

Inhalation

Hyperventilation may develop. Vapors may cause dizziness or asphyxiation without warning.

Skin

Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.

Eyes

Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.

Ingestion

Nausea, vomiting, and gastrointestinal hemorrhage may develop.

Hazards

Containers may explode when heated.

UN (DOT)

1977

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.

Respirators

Filter cartridge respirators are inadequate.

Exposure Effects

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.

Poison Class

-

Fire Fighting Measures

Fire Fighting

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.

Fire Potential

Noncombustible liquiduefied gas.

Accidental Release Measures

Small spills/leaks

Attempt to stop leak if without undue personnel hazard. Do not use water on material itself.

Stability and Reactivity

Stability

Incombustible and unreactive.

Incompatibilities

Reacts violently in mixture with magnesium powder when a fuse is lit.

Transport Information

UN Number

1977

Hazard Class

2.2