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LIQUID NITROGEN
Product Name:
Nitrogen, Refrigerated Liquid
Chemical Name:
Nitrogen
Formula:
N2 0
Chemical Family: Inert gas 3 0
Use:
Various, inerting, medical, food freezing SA
Synonyms:
Nitrogen NF, LIN, Cryogenic Liquid Nitrogen, Liquid Nitrogen

NFPA Fire: 0 HMIS Fire:
0 Acute:
Yes

NFPA Health: 3 HMIS Health:
3 Chronic:
No

NFPA Reactivity: 0 HMIS Reactivity:
0 Fire:
No

NFPA Special Hazard: SA Mixture:
No Reactive:
No

Sudden Release Pressure:
Yes
02. INGREDIENTS - COMPOSITION & INFORMATION

PERCENT EXPOSURE GUIDELINES
COMPONENT CAS No. (BY WT.) OSHA - TWA ACGIH - STEL
Nitrogen 7727-37-9 99.0% 100.0% None. Simple Asphyxiant
LD50: None. LC50: None.
03. HAZARDS IDENTIFICATION

EMERGENCY OVERVIEW:

Warning:
Extremely cold liquid and gas under pressure.

Can cause rapid suffocation.

May cause severe frostbite.

Potential Health Effects Information:

Routes of Exposure:

Inhalation:
Simple asphyxiant. Nitrogen is nontoxic, but may cause suffocation by displacing

the oxygen in air. Exposure to oxygen-deficient atmosphere (<19.5%) may cause

dizziness, drowsiness, nausea, vomiting, excess salivation, diminished mental

alertness, loss of consciousness and death. Exposure to atmospheres containing

8-10% or less oxygen will bring about unconsciousness without warning and so

quickly that the individuals cannot help or protect themselves. Lack of sufficient

oxygen may cause serious injury or death.

Eye Contact:
Tissue freezing and severe cryogenic burns of eyes.

Skin Contact:
Tissue freezing and severe cryogenic burns of skin.

Chronic Effects:
None

Medical Conditions Aggravated By
None.

Overexposure:

Carcinogenicity:
Nitrogen is not listed by NTP, OSHA, or IARC

Other Effects Of Overexposure:
None.
04. FIRST AID MEASURES

Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If breathing is

difficult, give oxygen. Get medical attention.

Eye:
In case of splash contamination, immediately flush eyes with water for at least 15

minutes. See physician, preferably an ophthalmologist, immediately.

Skin:
Remove any clothing that may restrict circulation to frozen area. Do not rub frozen

parts as tissue damage may result. As soon as practical place the affected area in a

warm water bath which has a temperature not to exceed 105F (40C). Never use

dry heat. Remove and thoroughly air out contaminated clothing. In case of

massive exposure, remove clothing while showering with warm water. Call a

physician as soon as possible.



Frozen tissue is painless and appears waxy with a possible yellow color. It will

become swollen, painful, and prone to infection when thawed. If the frozen part of

the body has been thawed by the time medical attention has been obtained, cover

the area with dry sterile dressing with a large bulky protective covering.

Ingestion:
None.

Notes To Physician:
None.
05. FIRE FIGHTING MEASURES

Flash Point:
Not applicable; Gas.

Auto ignition:
Not applicable.

Flammable Limits - Lower:
Not applicable.

Flammable Limits - Upper:
Not applicable.

Extinguishing Media:
Nitrogen is nonflammable and does not support combustion. Use extinguishing

media appropriate for the surrounding fire.

Fire Fighting Instructions:
Nitrogen is a simple asphyxiant. If possible, remove nitrogen cylinders from fire

area or cool with water. Do not direct water spray at the container vent.

Self-contained breathing apparatus may be required for rescue workers. Evacuate

this area.

Fire And Explosion Hazards:
Liquid nitrogen when spilled will vaporize rapidly forming an oxygen deficient vapor

cloud. Evacuate this vapor cloud area. Visibility may be obscured in its vapor

cloud. Pressure in a container can build up due to heat and it may rupture if

pressure relief devices should fail to function. Contact with cold liquid or

gaseousnitrogenn may cause frostbite.

Hazardous Combustion Products:
None known.

Sensitivity To Static Discharge:
Not applicable.

Sensitivity To Mechanical Impact:
None.
06. ACCIDENTAL RELEASE MEASURES

Evacuate:
Evacuate all personnel from the affected area. Shut off source of Nitrogen if

possible without risk. Ventilate area or remove leaking containers to a well

ventilated location.



To increase rate of vaporization, spray large amounts of water onto the spill from an

upwind position. Avoid contact with liquid nitrogen or cold gas. If leaking from

container or its valve, contact your supplier.
07. HANDLING AND STORAGE

Storage:
Store and use with adequate ventilation. Do not store in a confined space.

Cryogenic containers are equipped with pressure relief devices to control internal

pressure. Under normal conditions these containers will periodically vent product.

Some metals such as carbon steel may become brittle at low temperatures and will

easily fracture. Prevent entrapment of liquid in closed systems or piping without

pressure relief devices.

Handling:
Never allow any unprotected part of the body to touch un-insulated pipes or vessels

which contain cryogenic fluids. The extremely cold metal will cause the flesh to

stick fast and tear when one attempts to withdraw from it.

Use a suitable hand truck for container movement, Cryogenic containers shall be

handled and stored in an upright position. Do not drop, or roll containers on their

sides, If user experiences any difficulty operating container valve discontinue use,

and contact supplier. For additional precautions in using liquid nitrogen see Section

16 - Other Information.
08. EXPOSURE CONTROLS - PERSONAL PROTECTION

Engineering Controls:

Ventilation:
Natural or mechanical to prevent oxygen-deficient atmospheres under 19.5%

oxygen.

Personal Protective Equipment (PPE):

Clothing:
Long sleeve shirts and trousers without cuffs.

Eye/Face Protection:
Full face shield and safety glasses are recommended.

Shoes:
Safety shoes are recommended when handling cylinders.

Gloves:
Loose fitting thermal insulated or leather gloves.

Respiratory Protection:
Before entering area you must check for flammable and oxygen deficient

atmospheres.

Respirator:
None required in general use.

Emergency Use:
Self-contained breathing apparatus (SCBA) or positive pressure airline with mask

are to be used in oxygen-deficient atmosphere. Respirators will not function.
09. PHYSICAL AND CHEMICAL PROPERTIES

Physical State:
Liquid gas

Color:
Colorless

Odor:
Odorless

Molecular Weight:
28.01

Boiling Point:
-320.4F (-195.8C) @ 1 atm

Specific Gravity:
.967 At 70F (21.1C) @ 1 atm, Air = 1

Freezing/Melting Point:
-345.8F (-209.9C), @ 1 atm

Vapor Pressure:
Not Applicable

Vapor Density:
.072 lb./cu ft (1.153 kg/CuM), At 70F (21.1C) @ 1 atm

Water Solubility:
.023 Vol./Vol. At 32 F (0C)

Expansion Ratio:
1-696.5 70F (21.1C)

pH:
Not Applicable - Gas

Odor Threshold:
Not Applicable - Gas

Evaporation Rate:
Not Applicable - Gas

Coefficient Of Water/Oil Distribution:
Information not available
10. STABILITY AND REACTIVITY

Chemical Stability:
Stable

Conditions To Avoid:
None.

Incompatibility With Other Materials:
None

Hazardous Decomposition Products:
None

Hazardous Polymerization:
Will not occur
11. TOXICOLOGICAL INFORMATION

Irritancy Of Material:
None.

Reproductive Effects:
None.

Teratogenicity:
None.

Synergistic Materials:
None.

Sensitization To Material:
None.

Mutagenicity:
None.
12. ECOLOGICAL INFORMATION

Unassigned:
The atmosphere contains approximately 78% nitrogen. No adverse ecological

effects are expected. Nitrogen does not contain any Class I or Class II ozone

depleting chemicals (40 CFR Part 82). Nitrogen is not listed as a marine pollutant

by DOT (49 CFR Part 171).
13. DISPOSAL CONSIDERATIONS

Waste Disposal Method:
Do not attempt to dispose of residual or unused quantities. Return cylinder to

supplier.

For emergency disposal, discharge slowly to the atmosphere in a well ventilated

area or outdoors.
14. TRANSPORT INFORMATION

DOT/IMO Shipping Name:
Nitrogen, refrigerated liquid.

Hazard Class:
2.2 (Non Flammable gas.)

Identification Number:
UN 1977

PIN:
1977

Product RQ:
None.

Shipping Label:
Nonflammable Gas

Placard (When Required):
Nonflammable Gas.

Special Shipping Information:
Cylinders should be transported in a secure position, in a well ventilated vehicle.

The transportation of compressed gas cylinders in automobiles or in closed-body

vehicles can present serious hazards and should be discouraged.

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