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Liquid Oxygen Safety Data Sheet

Product Name:Liquid Oxygen
Chemical Name:Oxygen
Formula:O2
Chemical Family:Oxidizer
Use:Welding, Medical
Synonyms:Oxygen USP, Aviators Breathing Oxygen (ABO)
NFPA Fire:0
NFPA Health:3
NFPA Reactivity:0
NFPA Special Hazard:SA
HMIS Fire:0
HMIS Health:3
HMIS Reactivity:0
Mixture:No
Acute:No
Chronic:No
Fire:Yes
Reactive:No
Sudden Release Pressure:Yes
Ingredients - Composition Information
Component:Oxygen
CAS No.7782-44-7
Percent (by weight)99.0% 100.0%
ACGIH - STELSimple Asphyxiant
Emergency Overview
Danger:Extremely cold oxidizing liquid and gas under pressure. Vigorously accelerates combustion. Combustibles in contact with liquid oxygen may explode on ignition or impact. Can cause severe frostbite.
Potential Health Effects Information
Inhalation:Breathing 80% or more oxygen at atmospheric pressure for more that a few hours may cause nasal stuffiness, cough , sore throat, chest pain and breathing difficulty.Breathing oxygen at higher pressure increases the likelihood of adverse effects within a shorter time period. Breathing pure oxygen under pressure may cause lung damage and also central nervous system effects resulting in dizziness, poor coordination, tingling sensation, visual and hearing disturbances, muscular twitching, unconsciousness and convulsion. Breathing oxygen under pressure may cause prolongation of adaptation to darkness and reduced peripheral vision.
Eye:None.
Skin:None.
Ingestion:None.
Medical Conditions Aggravated By OverexposureNone.
Carcinogenicity:Not listed in NTP, OSHA or IARC
First Aid Measures
Inhalation:Move victim to fresh air. Call a physician. The physician should be advised that the victim has been exposed to a high concentration of oxygen.
Eye:Incase of splash contamination, immediately flush eyes with plenty of water for at least 15 minutes. See a 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. 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.
Handling and Storage
Storage:Store and use with adequate ventilation. Do not store in a confined space. Post "No Smoking or Open Flames" signs in the storage area. 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. Do not drop, tip, or roll containers on their side. If user experiences any difficulty operating container valve discontinue use and contact supplier, Containers of liquid oxygen should be separated from flammable gas containers by a minimum distance of 20 ft., or by a barrier of noncombustible material at least 5 ft. high having a fire resistance rating of 1/2 hour. For additional precautions in using liquid oxygen
Exposure Control - Personal Protection
Engineering Controls:
Ventilation:Natural or mechanical to prevent oxygen-enriched atmospheres over 21% 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:Gas
Color:Colorless gas.
Odor:Oderless
Molecular Weight:32
Boiling Point:-297.3°F (-183.0°C) @ 1 atm
Specific Gravity:1.14 At 70°F (21.1°C) @ 1 atm, Air = 1
Freezing/Melting Point:-361.1°F (-218.4°C), @ 1 atm
Vapor Pressure:Not Applicable
Vapor Density:083 lb./cu ft (1.326 kg/CuM), At 70°F (21.1°C) @ 1 atm
Water Solubility:.0489 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
Hazardous Decomposition Products:None
Hazardous Polymerization:Will not occur
Ecological Information
Ecotoxicity:No adverse ecological effects are expected. Acetylene does not contain any Class I or Class II Ozone depleting chemicals (40 CFR Part 82). Acetylene is not listed as a marine pollutant by DOT (49 CFR Part 171).
Disposal Considerations
Waste Disposal Method:Do not attempt to dispose of residual or unused quantities. Return cylinder to supplier.Unserviceable cylinders should be returned to the supplier for safe and proper disposal. For emergency disposal, discharge slowly to the atmosphere in a well ventilated area or outdoors.
Transport Information
DOT/IMO Shipping Name:Oxygen, refrigerated liquid
Hazard Class:2.2 (Non flammable gas.)
Identification Number:UN 1073
PIN:1073
Product RQ:None.
Shipping Label:Non Flammable 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.