PRODUCT NAME: Nitrogen, refrigerated liquid
CHEMICAL NAME: Nitrogen FORMULA: N2
SYNONYMS: Liquid Nitrogen, LIN, Cryogenic Liquid Nitrogen, Nitrogen
MANUFACTURER: Air Products and Chemicals, Inc.
PRODUCT INFORMATION: 1-800-752-1597
MSDS NUMBER: 1041 REVISION: 5
REVISION DATE: July 1995**
Nitrogen is sold as pure product > 99%.
CAS NUMBER: 7727-37-9
EXPOSURE LIMITS:
OSHA: Not established ACGIH: Simple asphyxiant
Liquid nitrogen is a colorless, odorless, extremely cold liquid and gas under pressure. It can cause rapid suffocation when concentrations are sufficient to reduce oxygen levels below 19.5%. Self Contained Breathing Apparatus (SCBA) may be required. Contact with liquid or cold vapors can cause severe frostbite. Cold vapors in the air will appear as a white fog due to condensation of moisture. While this may indicate the presence of the gas it should not be used to determine its concentration in the atmosphere. Oxygen concentrations must be monitored in the release area. All cryogenic liquids produce large volumes of gas when they vaporize. One volume of liquid nitrogen will expand to produce 696.5 equivalent volumes of gas.
800-523-9374 Continental U.S., Canada and Puerto Rico
610-481-7711 other locations
POTENTIAL HEALTH EFFECTS INFORMATION:
INHALATION: Simple asphyxiant.
EYE CONTACT: Tissue freezing and severe cryogenic burns if contacted into eyes.
SKIN CONTACT: Tissue freezing and severe cryogenic burn of skin.
CHRONIC EFFECTS: None established.
EXPOSURE INFORMATION:
ROUTE OF ENTRY: Inhalation
TARGET ORGANS: None
EFFECT: Asphyxiation (suffocation)
Skin contact with liquid nitrogen can cause tissue freezing, resulting in severe burns. The burns are caused by the extremely low temperature of the cryogenic liquid and not the result of chemical action. Skin may appear red with the formation of blisters. In cases that involve prolonged or severe exposure, tissue may freeze and have a waxy or yellow appearance.
MEDICAL CONDITIONS AGGRAVATED BY OVEREXPOSURE: None
CARCINOGENIC POTENTIAL: Nitrogen is not listed by NTP, OSHA or IARC as a carcinogen or suspected carcinogen.
INHALATION: Persons suffering from lack of oxygen should be moved to fresh air. If victim is not breathing, administer artificial respiration. If breathing is difficult, administer oxygen. Obtain prompt medical attention.
SKIN CONTACT: 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. 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, cover the area with dry sterile dressing with a large bulky protective covering, pending medical care. In case of massive exposure, remove clothing while showering with warm water. Call a physician.
EYE CONTACT: For exposure to liquid, immediately warm frostbite area with warm water (not to exceed 105°F).
FLASH POINT: AUTO IGNITION: FLAMMABLE LIMIT:
Not Applicable Nonflammable Nonflammable
EXTINGUISHING MEDIA: Nitrogen is nonflammable and does not support combustion. Use extinguishing media appropriate for the surrounding fire.
HAZARDOUS COMBUSTION PRODUCTS: None
SPECIAL FIRE FIGHTING INSTRUCTIONS: Nitrogen is a simple asphyxiant. If possible, remove nitrogen containers 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 the area.
UNUSUAL FIRE AND EXPLOSION HAZARDS: Liquid nitrogen when spilled will vaporize rapidly forming an oxygen deficient vapor cloud. Evacuate this area. 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 gaseous oxygen may cause frostbite. Visibility may be obscured in its vapor cloud.
Evacuate all personnel from affected area. Increase ventilation to release area and monitor oxygen level. Use appropriate protective equipment (SCBA). To increase rate of vaporization spray large amounts of water on to the spill from an upwind position. If leak is from container or it's valve, call the Air Products emergency telephone number. Do NOT spray water directly at leak. If leak is in user’s system close cylinder valve and vent pressure before attempting repairs.
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. Do not plug, remove, or tamper with pressure relief device.
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. Containers shall be handled and stored in an upright position. Do not drop, tip, or roll containers on their sides. Do not remove or interchange connections. If user experiences any difficulty operating container valve or with container connections discontinue use and contact supplier. Use the proper connection. DO NOT USE ADAPTERS.
Use piping and equipment adequately designed to withstand pressures to be encountered. Use a check valve or other protective apparatus in any line or piping from the cylinder to prevent reverse flow. To prevent cryogenic liquids or cold gas from being trapped in piping between valves the piping shall be equipped with pressure relief devices. Only transfer lines designed for cryogenic liquids shall be used. Some metals such as carbon steel may become brittle at low temperatures, will easily fracture and should not be used with cryogenic liquids. It is recommended that all vents be piped to the exterior of the building.
SPECIAL PRECAUTIONS: Some metals, such as carbon steel, may become brittle and fracture at low temperatures.
For additional information concerning storage and handling refer to Compressed Gas Association pamphlet P-12 Safe Handling of Cryogenic Liquids available from the Compressed Gas Association, Inc., 1725 Jefferson Davis Highway, Arlington, VA 22202-4102 Telephone (703) 412-0900.
ENGINEERING CONTROLS: Natural or mechanical ventilation to prevent oxygen deficient atmospheres under 19.5% oxygen.
RESPIRATORY PROTECTION:
General Use: None required.
PROTECTIVE GLOVES: Loose fitting thermal insulated or leather gloves.
EYE PROTECTION: Full face shield and safety glasses are recommended.
OTHER PROTECTIVE EQUIPMENT: Safety shoes when handling containers. Long sleeve shirts and trousers without cuffs.
APPEARANCE: Colorless, cryogenic liquid
ODOR: Odorless
MOLECULAR WEIGHT: 28.01
BOILING POINT (1 atm): -320.4 ° F (-195.8 ° C)
SPECIFIC GRAVITY (Air = 1): 0.967
FREEZING POINT/MELTING POINT: -345.8 ° F (-209.9 ° C)
VAPOR PRESSURE (AT 20 ° C): Not applicable
GAS DENSITY (At 70 ° F (21.1 ° C) and 1 Atm): 0.072 lb/ft3 (1.153 kg/m3)
SOLUBILITY IN WATER (Vol/Vol at 32 ° F (0 ° C)): 0.023
EXPANSION RATIO: (For liquid to gas) at 70 ° F (21.1 ° C): 1 to 696.5
CHEMICAL STABILITY: Stable
CONDITIONS TO AVOID: None
INCOMPATIBILITY: None
HAZARDOUS DECOMPOSITION PRODUCTS: None
HAZARDOUS POLYMERIZATION: Will not occur.
Nitrogen is a simple asphyxiant.
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. Nitrogen is not listed as a marine pollutant by DOT 49 CFR.
UNUSED PRODUCT/EMPTY CONTAINER: Return container and unused product to supplier. Do not attempt to dispose of unused product.
DISPOSAL: For emergency disposal, discharge slowly to the atmosphere in a well ventilated area or outdoors.
DOT HAZARD CLASS: 2.2
DOT SHIPPING LABEL: Nonflammable Gas
DOT SHIPPING NAME: Nitrogen, Refrigerated Liquid
IDENTIFICATION NUMBER: UN1977
REPORTABLE QUANTITY (RQ): None
SPECIAL SHIPPING INFORMATION: Containers should be transported in a secure upright position in a well ventilated truck. Never transport in passenger compartment of a vehicle.
U.S. FEDERAL REGULATIONS:
CERCLA: Comprehensive Environmental Response, Compensation, and Liability Act of 1980 requires notification to the National Response Center of a release of quantities of hazardous substances equal to or greater than the reportable quantities (RQ) in 40 CFR 302.4.
CERCLA REPORTABLE QUANTITY: None
SARA TITLE III: SUPERFUND AMENDMENT AND REAUTHORIZATION ACT OF 1986
Nitrogen is not listed as an Extremely Hazardous Substance.
IMMEDIATE HEALTH: Yes PRESSURE: Yes
DELAYED HEALTH: No REACTIVITY: No
FIRE: No
Nitrogen is not listed as a toxic chemical.
TOXIC SUBSTANCE CONTROL ACT (TSCA): Nitrogen is listed on the TSCA inventory.
Environmental Protection Agency (EPA)
Nitrogen is not listed as a regulated substance.
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA)
Nitrogen is not listed as a Highly Hazardous Chemical.
STATE REGULATIONS:
CALIFORNIA:
SCAQMD Rule: VOC = Not applicable
NFPA RATINGS: HMIS RATINGS:
HEALTH: 3 HEALTH: 3
FLAMMABILITY: 0 FLAMMABILITY: 0
REACTIVITY: 0 REACTIVITY: 0
SPECIAL: SA*
*Compressed Gas Association recommendation to designate simple asphyxiant.
** Documents with effective dates of July 1995 and July 1998 are identical in content and either may be used.