Product: Oxygen P-4638-E Date: January 2003
Praxair Material Safety Data Sheet
1. Chemical Product and Company Identification
Product Name: Oxygen, compressed (MSDS No. P-4638-E) Trade Name: Oxygen, Medipure鈩? Oxygen
Chemical Name: Oxygen Synonyms: Dioxygen
Formula: O2 Chemical Family: Permanent gas
1-800-645-4633* Company Name: Praxair, Inc.
Telephone: Emergencies:
CHEMTREC: 1-800-424-9300* 39 Old Ridgebury Road
1-800-PRAXAIR Danbury, CT 06810-5113
Routine:
* Call emergency numbers 24 hours a day only for spills, leaks, fire, exposure, or accidents involving this
product. For routine information, contact your supplier, Praxair sales representative, or call
1-800-PRAXAIR (1-800-772-9247).
2. Composition/Information on Ingredients
This section covers materials of manufacture only. See sections 3, 8, 10, 11, 15, and 16 for
information on by-products generated during use, especially use in welding and cutting. See section
16 for important information about mixtures.
CAS CONCEN-
INGREDIENT NUMBER TRATION OSHA PEL ACGIH TLV-TWA (2002)
Oxygen 7782-44-7 >99%* None currently established None currently established
*The symbol > means 鈥済reater than.鈥?
3. Hazards Identification
EMERGENCY OVERVIEW
WARNING! High-pressure, oxidizing gas.
Vigorously accelerates combustion.
Self-contained breathing apparatus may be required by rescue workers.
Odor: None
THRESHOLD LIMIT VALUE: None currently established. ACGIH, 2002, recommends a TLV-TWA
of 5 mg/m3 for welding fumes not otherwise classified (NOC) that may be generated during welding with
this product. See section 16 for more information on welding hazards. TLV-TWAs should be used as a
guide in the control of health hazards and not as fine lines between safe and dangerous concentrations.
Copyright 漏 1978, 1985, 1992, 1997, 2003, Praxair Technology, Inc. Page 1 of 10
All rights reserved.
Revised
Product: Oxygen P-4638-E Date: January 2003
EFFECTS OF A SINGLE (ACUTE) OVEREXPOSURE:
INHALATION鈥揃reathing 80% or more oxygen at atmospheric pressure for more than 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 (CNS) effects
resulting in dizziness, poor coordination, tingling sensation, visual and hearing disturbances, muscular
twitching, unconsciousness, and convulsions. Breathing oxygen under pressure may cause
prolongation of adaptation to darkness and reduced peripheral vision.
SKIN CONTACT鈥揘o harm expected.
SWALLOWING鈥揟his product is a gas at normal temperature and pressure.
EYE CONTACT鈥揘o harm expected.
EFFECTS OF REPEATED (CHRONIC) OVEREXPOSURE: No harm expected.
OTHER EFFECTS OF OVEREXPOSURE: See section 11, Toxicological Information.
MEDICAL CONDITIONS AGGRAVATED BY OVEREXPOSURE: See section 11, Toxicological
Information.
SIGNIFICANT LABORATORY DATA WITH POSSIBLE RELEVANCE TO HUMAN HEALTH
HAZARD EVALUATION: None known.
CARCINOGENICITY: Oxygen is not listed by NTP, OSHA, or IARC.
4. First Aid Measures
INHALATION: Immediately remove to fresh air. If not breathing, give artificial respiration. Keep
victim warm and at rest. Call a physician. Advise the physician that the victim has been exposed to a high
concentration of oxygen.
SKIN CONTACT: Wash with soap and water; seek medical attention if discomfort persists.
SWALLOWING: This product is a gas at normal temperature and pressure.
EYE CONTACT: Flush eyes thoroughly with water. Hold the eyelids open and away from the eyeballs
to ensure that all surfaces are flushed thoroughly. Get medical attention if discomfort persists.
NOTES TO PHYSICIAN: Supportive treatment should include immediate sedation, anti-convulsive
therapy if needed, and rest. See section 11, Toxicological Information.
5. Fire Fighting Measures
FLASH POINT (test method): Not applicable
AUTOIGNITION TEMPERATURE: Not applicable
FLAMMABLE LIMITS IN AIR, % by volume: LOWER: Not applicable UPPER: Not applicable
EXTINGUISHING MEDIA: Vigorously accelerates combustion. Use media appropriate for
surrounding fire. Water (e.g., safety shower) is the preferred extinguishing method for clothing fires.
SPECIAL FIRE FIGHTING PROCEDURES: WARNING! High-pressure, oxidizing gas. Evacuate
all personnel from danger area. Immediately deluge cylinders with water from maximum distance until
cool; then move them away from fire area if without risk. Self-contained breathing apparatus may be
required by rescue workers. On-site fire brigades must comply with OSHA 29 CFR 1910.156.
Page 2 of 10
Product: Oxygen P-4638-E Date: January 2003
UNUSUAL FIRE AND EXPLOSION HAZARDS: Oxidizing agent; vigorously accelerates
combustion. Contact with flammable materials may cause fire or explosion. Heat of fire can build
pressure in cylinder and cause it to rupture. Oxygen cylinders are equipped with a pressure relief device.
(Exceptions may exist where authorized by DOT.) No part of cylinder should be subjected to a
temperature higher than 125掳F (52掳C). Smoking, flames, and electric sparks in the presence of enriched
oxygen atmospheres are potential explosion hazards.
HAZARDOUS COMBUSTION PRODUCTS: None known.
6. Accidental Release Measures
STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED: WARNING! High-
pressure, oxidizing, gas. Shut off flow if without risk. Ventilate area or move cylinder to a well-
ventilated area. Remove all flammable materials from vicinity. Oxygen must never be permitted to strike
an oily surface, greasy clothes, or other combustible material.
WASTE DISPOSAL METHOD: Prevent waste from contaminating the surrounding environment.
Keep personnel away. Discard any product, residue, disposable container, or liner in an environmentally
acceptable manner, in full compliance with federal, state, and local regulations. If necessary, call your
local supplier for assistance.
7. Handling and Storage
PRECAUTIONS TO BE TAKEN IN STORAGE: Store and use with adequate ventilation, away from
oil, grease, and other hydrocarbons. Separate oxygen cylinders from flammables by at least 20 ft (6.1 m)
or use a barricade of noncombustible material. This barricade should be at least 5 ft (1.53 m) high and
have a fire resistance rating of at least 陆 hour. Firmly secure cylinders upright to keep them from falling
or being knocked over. Screw valve protection cap firmly in place by hand. Store only where temperature
will not exceed 125掳F (52掳C). Store full and empty cylinders separately. Use a first-in, first-out inventory
system to prevent storing full cylinders for long periods.
PRECAUTIONS TO BE TAKEN IN HANDLING: Protect cylinders from damage. Use a suitable
hand truck to move cylinders; do not drag, roll, slide, or drop. Never attempt to lift a cylinder by its cap;
the cap is intended solely to protect the valve. Never insert an object (e.g., wrench, screwdriver, pry bar)
into cap openings; doing so may damage the valve and cause a leak. Use an adjustable strap wrench to
remove over-tight or rusted caps. Open valve slowly. If valve is hard to open, discontinue use and contact
your supplier. Never apply flame or localized heat directly to any part of the cylinder. High temperatures
may damage the cylinder and could cause the pressure relief device to fail prematurely, venting the
cylinder contents. For other precautions in using this mixture, see section 16.
For additional information on storage and handling, refer to Compressed Gas Association (CGA)
pamphlet P-1, Safe Handling of Compressed Gases in Containers, available from the CGA. Refer to
section 16 for the address and phone number along with a list of other available publications.
Page 3 of 10
Product: Oxygen P-4638-E Date: January 2003
8. Exposure Controls/Personal Protection
VENTILATION/ENGINEERING CONTROLS:
LOCAL EXHAUST鈥揢se a local exhaust system, if necessary, to prevent increased oxygen
concentration and, in welding, to keep hazardous fumes and gases below applicable TLVs in the
worker鈥檚 breathing zone.
MECHANICAL (general)鈥揋eneral exhaust ventilation may be acceptable if it can maintain a
supply of air that is not too rich in oxygen and, during welding, can keep hazardous fumes and gases
below applicable TLVs in the worker鈥檚 breathing zone.
SPECIAL鈥揘one
OTHER鈥揘one
RESPIRATORY PROTECTION: None required under normal use. However, air-supplied respirators
are required while working in confined spaces with this product. For welding, use air-purifying or air-
supplied respirators, as appropriate, where local or general exhaust ventilation is inadequate. Adequate
ventilation must keep worker exposure below applicable TLVs for fumes, gases, and other by-products of
welding with oxygen. See sections 3, 10, and 16 for details. The respiratory protection used must conform
with OSHA rules as specified in 29 CFR 1910.134.
SKIN PROTECTION: Wear work gloves when handling cylinders; welding gloves for welding. Gloves
must be free of oil and grease.
EYE PROTECTION: Wear safety glasses when handling cylinders. For welding, wear goggles with
filter lens selected as per ANSI Z49.1. Provide protective screens and goggles, if necessary, to protect
others. Select as per OSHA 29 CFR 1910.33
OTHER PROTECTIVE EQUIPMENT: Metatarsal shoes for cylinder handling. Select in accordance
with OSHA 29 CFR 1910.132 and 1910.133. As needed for welding, wear hand, head, and body
protection to help prevent injury from radiation and sparks. (See ANSI Z49.1.) At a minimum, this
includes welder鈥檚 gloves and protective goggles, and may include arm protectors, aprons, hats, shoulder
protection, as well as substantial clothing. Regardless of protective equipment, never touch live electrical
parts.
9. Physical and Chemical Properties
MOLECULAR WEIGHT: 31.9988
SPECIFIC GRAVITY (Air = 1) at 70掳F (21.1掳C) and 1 atm: 1.105
SOLUBILITY IN WATER, vol/vol at 32掳F (0掳C): 0.0489
PERCENT VOLATILES BY VOLUME: 100
BOILING POINT at 1 atm: -297.4掳F (-183掳C)
FREEZING POINT at 1 atm: -361.1掳F (-218.4掳C)
APPEARANCE, ODOR, AND STATE: Colorless, odorless, tasteless gas at normal temperature
and pressure.
Page 4 of 10
Product: Oxygen P-4638-E Date: January 2003
10. Stability and Reactivity
Unstable Stable
STABILITY:
INCOMPATIBILITY (materials to avoid): Combustible materials, asphalt, flammable materials, especially
oils and greases. Oxygen reacts with many materials.
HAZARDOUS DECOMPOSITION PRODUCTS: None known.
May Occur Will Not Occur
HAZARDOUS POLYMERIZATION:
CONDITIONS TO AVOID: None known.
11. Toxicological Information
The welding process may generate hazardous fumes and gases. (See sections 3, 10, 15, and 16.)
At atmospheric concentration and pressure, oxygen poses no toxicity hazards. At high concentrations,
newborn premature infants may suffer delayed retinal damage (retrolental fibroplasia) that can progress to
retinal detachment and blindness. Retinal damage may also occur in adults exposed to 100% oxygen for
extended periods (24 to 48 hours) or at pressures exceeding atmospheric pressure, particularly in
individuals whose retinal circulation has been previously compromised. All individuals exposed for long
periods to oxygen at high pressure and all who exhibit overt oxygen toxicity should have ophthalmologic
examinations.
At two or more atmospheres, CNS toxicity occurs. Symptoms include nausea, vomiting, dizziness or
vertigo, muscle twitching, vision changes, and loss of consciousness and generalized seizures. At three
atmospheres, CNS toxicity occurs in less than two hours; at six atmospheres, in only a few minutes.
Patients with chronic obstructive pulmonary disease retain carbon dioxide abnormally. If oxygen is
administered, raising their blood-oxygen concentration, their breathing becomes depressed and retained
carbon dioxide rises to a dangerous level.
Animal studies suggest that the administration of certain drugs, including phenothiazine drugs and
chloroquine, increases the susceptibility to toxicity from oxygen at high concentrations or pressures.
Animal studies also indicate that vitamin E deficiency may increase susceptibility to oxygen toxicity.
Airway obstruction during high oxygen tension may cause alveolar collapse following absorption of the
oxygen. Similarly, occlusion of the eustachian tubes may cause retraction of the eardrum and obstruction
of the paranasal sinuses may produce vacuum-type headache.
12. Ecological Information
No adverse ecological effects expected. Oxygen does not contain any Class I or Class II ozone-depleting
chemicals. Oxygen is not listed as a marine pollutant by DOT.
13. Disposal Considerations
WASTE DISPOSAL METHOD: Do not attempt to dispose of residual or unused quantities. Return
cylinder to supplier. For emergency disposal, secure cylinder in a well-ventilated area or outdoors; then
slowly discharge gas to the atmosphere.
Page 5 of 10
Product: Oxygen P-4638-E Date: January 2003
14. Transport Information
Oxygen, compressed
DOT/IMO SHIPPING NAME:
2.2 IDENTIFICATION NUMBER: UN 1072 PRODUCT RQ: None
HAZARD CLASS:
OXYGEN. An oxygen label may be used for domestic shipment in the
SHIPPING LABEL(s):
United States and Canada in place of the NONFLAMMABLE GAS and
OXIDIZER labels (49 CFR Part 172).
NONFLAMMABLE GAS or OXYGEN
PLACARD (when required):
SPECIAL SHIPPING INFORMATION: Cylinders should be transported in a secure position, in a
well-ventilated vehicle. Cylinders transported in an enclosed, nonventilated compartment of a vehicle can
present serious safety hazards.
Shipment of compressed gas cylinders that have been filled without the owner鈥檚 consent is a violation of
federal law [49 CFR 173.301(b)].
15. Regulatory Information
The following selected regulatory requirements may apply to this product. Not all such requirements are
identified. Users of this product are solely responsible for compliance with all applicable federal, state,
and local regulations.
U.S. FEDERAL REGULATIONS:
EPA (ENVIRONMENTAL PROTECTION AGENCY)
CERCLA: COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND
LIABILITY ACT OF 1980 (40 CFR Parts 117 and 302):
Reportable Quantity (RQ): None
SARA: SUPERFUND AMENDMENT AND REAUTHORIZATION ACT:
SECTIONS 302/304: Require emergency planning based on Threshold Planning Quantity
(TPQ) and release reporting based on Reportable Quantities (RQ) of Extremely Hazardous
Substances (EHS) (40 CFR Part 355):
Threshold Planning Quantity (TPQ): None
EHS RQ (40 CFR 355): None
SECTIONS 311/312: Require submission of MSDSs and reporting of chemical inventories
with identification of EPA hazard categories. The hazard categories for this product are as
follows:
IMMEDIATE: No PRESSURE: Yes
DELAYED: No REACTIVITY: No
FIRE: Yes
SECTION 313: Requires submission of annual reports of release of toxic chemicals that
appear in 40 CFR Part 372.
Oxygen does not require reporting under Section 313.
40 CFR 68: RISK MANAGEMENT PROGRAM FOR CHEMICAL ACCIDENTAL
RELEASE PREVENTION: Requires development and implementation of risk management
programs at facilities that manufacture, use, store, or otherwise handle regulated substances in
quantities that exceed specified thresholds.
Oxygen is not listed as a regulated substance.
TSCA: TOXIC SUBSTANCES CONTROL ACT: Oxygen is listed on the TSCA inventory.
Page 6 of 10
Product: Oxygen P-4638-E Date: January 2003
OSHA: OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION:
29 CFR 1910.119: PROCESS SAFETY MANAGEMENT OF HIGHLY HAZARDOUS
CHEMICALS: Requires facilities to develop a process safety management program based on
Threshold Quantities (TQ) of highly hazardous chemicals.
Oxygen is not listed in Appendix A as a highly hazardous chemical.
STATE REGULATIONS:
CALIFORNIA: Oxygen is not listed by California under the SAFE DRINKING WATER AND
TOXIC ENFORCEMENT ACT OF 1986 (Proposition 65).
PENNSYLVANIA: Oxygen is subject to the PENNSYLVANIA WORKER AND COMMUNITY
RIGHT-TO-KNOW ACT (35 P.S. Sections 7301-7320).
16. Other Information
Be sure to read and understand all labels and instructions supplied with all containers of this product.
WARNING: Medical grades of oxygen are subject to strict federal regulations and are for use only
under the control of a licensed physician or clinician familiar with the product and its hazards.
ADDITIONAL SAFETY AND HEALTH HAZARDS: High-pressure, oxidizing gas. Clean all
gauges, valves, regulators, piping, and equipment to be used in oxygen service in accordance with CGA
pamphlet G-4.1. Keep cylinders and their valves free of oil and grease. Use piping and equipment
adequately designed to withstand pressures to be encountered. Close cylinder valve after each use; keep
closed even when empty. Never use oxygen as a substitute for compressed air. Never use an oxygen jet
for cleaning purposes of any sort, especially for clothing. Oxygen increases the likelihood of an engulfing
fire. Never work on a pressurized system. If a leak occurs, close the cylinder valve. Blow the system
down in a safe and environmentally sound manner in compliance with all federal, state, and local laws;
then repair the leak. Never place a compressed gas cylinder where it may become part of an electrical
circuit.
Personnel who have been exposed to high concentrations of oxygen should stay in a well-ventilated or
open area before going into a confined space or near an ignition source.
SPECIAL PRECAUTIONS: Use in welding and cutting. Read and understand the manufacturer鈥檚
instructions and the precautionary label on the product. See American Standard Z49.1, Safety in Welding
and Cutting, published by the American Welding Society, PO Box 351040, Miami, FL 33135, and OSHA
Publication 2206 (29CFR 1910), US Government Printing Office, Washington, DC 20402, for more
information.
Arcs and sparks can ignite combustible materials. Prevent fires. Refer to NFPA 51B, Cutting and
Welding Processes. Do not strike an arc on the cylinder. The defect produced by an arc burn could lead
to cylinder rupture.
MIXTURES: When you mix two or more gases or liquefied gases, you can create additional,
unexpected hazards. Obtain and evaluate the safety information for each component before you produce
the mixture. Consult an industrial hygienist or other trained person when you evaluate the end product.
Remember, gases and liquids have properties that can cause serious injury or death.
Page 7 of 10
Product: Oxygen P-4638-E Date: January 2003
HAZARD RATING SYSTEMS:
NFPA RATINGS: HMIS RATINGS:
HEALTH HEALTH
=0 =0
FLAMMABILITY FLAMMABILITY
=0 =0
INSTABILITY PHYSICAL HAZARD
=0 =0
SPECIAL = OX (OXidizer)
STANDARD VALVE CONNECTIONS FOR U.S. AND CANADA:
0-3000 psig CGA-540
THREADED:
3001-4000 psig CGA-577
4001-5500 psig CGA-701
0-3000 psig CGA-870 (Medical Use)
PIN-INDEXED YOKE:
ULTRA-HIGH-INTEGRITY CONNECTION: 0-3000 psig CGA-714
Use the proper CGA connections. DO NOT USE ADAPTERS.
Ask your supplier about free Praxair safety literature as referred to in this MSDS and on the label for this
product. Further information about this product can be found in the following pamphlets published by the
Compressed Gas Association, Inc. (CGA), 4221 Walney Road, 5th Floor, Chantilly, VA 20151-2923,
Telephone (703) 788-2700.
AV-1 Safe Handling and Storage of Compressed Gases
AV-8 Characteristics and Safe Handling of Cryogenic Liquid and Gaseous Oxygen
G-4 Oxygen
G-4.1 Cleaning Equipment for Oxygen Service
P-1 Safe Handling of Compressed Gases in Containers
P-2 Characteristics and Safe Handling of Medical Gases
P-14 Accident Prevention in Oxygen-Rich, Oxygen-Deficient Atmospheres
SB-2 Oxygen-Deficient Atmospheres
SB-8 Use of Oxy-Fuel Gas Welding and Cutting Apparatus
V-1 Compressed Gas Cylinder Valve Inlet and Outlet Connections
鈥? Handbook of Compressed Gases, Fourth Edition
Page 8 of 10
Product: Oxygen P-4638-E Date: January 2003
Praxair asks users of this product to study this MSDS and become aware of product hazards and
safety information. To promote safe use of this product, a user should (1) notify employees, agents,
and contractors of the information in this MSDS and of any other known product hazards and safety
information, (2) furnish this information to each purchaser of the product, and (3) ask each purchaser
to notify its employees and customers of the product hazards and safety information.
Page 9 of 10
Product: Oxygen P-4638-E Date: January 2003
The opinions expressed herein are those of qualified experts within Praxair, Inc. We
believe that the information contained herein is current as of the date of this Material
Safety Data Sheet. Since the use of this information and the conditions of use of the
product are not within the control of Praxair, Inc., it is the user鈥檚 obligation to
determine the conditions of safe use of the product.
Praxair MSDSs are furnished on sale or delivery by Praxair or the independent distributors and suppliers
who package and sell our products. To obtain current Praxair MSDSs for these products, contact your
Praxair sales representative or local distributor or supplier. If you have questions regarding Praxair
MSDSs, would like the form number and date of the latest MSDS, or would like the names of the Praxair
suppliers in your area, phone or write the Praxair Call Center (Phone: 1-800-PRAXAIR;
Address: Praxair Call Center, Praxair, Inc., PO Box 44, Tonawanda, NY 14151-0044).
Praxair, the Flowing Airstream design, and Medipure are trademarks or registered trademarks of
Praxair Technology, Inc. in the United States and other countries.
Praxair, Inc.
39 Old Ridgebury Road
Danbury, CT 06810-5113
Page 10 of 10
Printed in USA
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