Skip to content

Liquid Nitrogen Safety Data Sheet

Product Name:Nitrogen, Refrigerated Liquid
Chemical Name:Nitrogen
Chemical Family:Inert Gas
NFPA Fire:0
NFPA Health:0
NFPA Reactivity:0
NFPA Special Hazard:SA
HMIS Fire:0
HMIS Health:0
HMIS Reactivity:0
Sudden Release Pressure:Yes
Ingredients – Composition Information
CAS No.7727-37-9
Percent (by weight)99.0% 100.0%
ACGIH – STELSimple Asphyxiant
Emergency Overview
Danger:High pressure gas. Can cause rapid suffocation. Do not breathe gas. Self contained breathing apparatus may be required by rescue workers.
Potential Health Effects Information
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:Tissue freezing and severe cryogenic burns of eyes.
Skin:Tissue freezing and severe cryogenic burns of skin.
Medical Conditions Aggravated By OverexposureNone.
Carcinogenicity:Not listed in NTP, OSHA or IARC
First Aid Measures
Inhalation:Persons suffering from lack of oxygen should be removed to fresh air. If victim is not breathing, administer artificial respiration. If breathing is difficult, administer oxygen. Obtain prompt 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 105°F (40°C). 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.
Notes To Physician:None.
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.
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 uninsulated 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
Exposure Control – Personal Protection
Engineering Controls:
Ventilation:Natural or mechanical to prevent oxygen-deficient atmospheres under 19.5% oxygen.
Personal Protective Equipment (PPE):
Skin Protection:
Clothing:Cotton clothing is recommended for use to prevent static buildup.
Glasses:Safety glasses are recommended when handling cylinders.
Shoes:Safety shoes are recommended when handling cylinders.
Gloves:Work gloves are recommended when handling cylinders.
Physical and Chemical Properties
Physical State:Liquid Gas
Color:Colorless gas.
Molecular Weight:28.01
Boiling Point:-320.4°F (-195.8°C) @ 1 atm
Specific Gravity:.967 At 70°F (21.1°C) @ 1 atm, Air = 1
Freezing/Melting Point:-345.8°F (-209.9°C), @ 1 atm
Vapor Density:.072 lb./cu ft (1.153 kg/CuM), At 70°F (21.1°C) @ 1 atm
Water Solubility:.023 Vol./Vol. At 32° F (0°C)
Expansion Ratio:Not Applicable – Gas
pH:Not Applicable – Gas
Odor Threshold:None
Evaporation Rate:Not Applicable – Gas
Coefficient Of Water/Oil Distribution:Information not available
Stability and Reactivity
Chemical Stability:Stable
Conditions To Avoid:None
Hazardous Decomposition Products:None
Hazardous Polymerization:Will not occur
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.
Transport Information
DOT/IMO Shipping Name:Nitrogen, compressed.
Hazard Class:2.2 (Non Flammable gas.)
Identification Number:UN 1977
Product RQ:None.
Shipping Label: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.
Placard (When Required):Non Flammable gas.