Product: Carbon Monoxide P-4576-H Date: September 2004
Praxair Material Safety Data Sheet
1. Chemical Product and Company Identification
Carbon monoxide, compressed Carbon Monoxide
Product Name: Trade Name:
(MSDS No. P-4576-H)
Chemical Name: Carbon monoxide Carbonic oxide, carbon
Synonyms:
oxide
CO Chemical Family: Permanent gas
Formula:
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
See section 16 for important information about mixtures.
INGREDIENT CAS NUMBER CONCENTRATION OSHA PEL ACGIH TLV-TWA (2004)
Carbon Monoxide 630-08-0 >99%* 50 ppm 25 ppm
*The symbol > means 鈥済reater than.鈥?
3. Hazards Identification
EMERGENCY OVERVIEW
DANGER! Toxic, flammable, odorless high-pressure gas.
Acts on blood, causing damage to central nervous system.
Can be fatal even with adequate oxygen.
Can form explosive mixtures with air.
Harmful if inhaled.
Self-contained breathing apparatus must be worn by rescue workers.
Odor: None
THRESHOLD LIMIT VALUE: TLV-TWA 25 ppm (ACGIH, 2004). 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 1979, 1985, 1989, 1992-1993, 1996-1997, 1999, 2004, Praxair Technology, Inc. Page 1 of 8
All rights reserved.
Revised
Product: Carbon Monoxide P-4576-H Date: September 2004
EFFECTS OF A SINGLE (ACUTE) OVEREXPOSURE:
INHALATION鈥揇epending on the concentration and duration of exposure, may cause headache,
drowsiness, dizziness, excitation, rapid breathing, pallor, cyanosis, excess salivation, nausea,
vomiting, hallucinations, confusion, angina, convulsions, and unconsciousness. With well-
established poisoning, the mucosal surface will be bright red (cherry red). Lack of oxygen can kill.
SKIN CONTACT鈥揘o harm expected.
SWALLOWING鈥揂 highly unlikely route of exposure. This product is a gas at normal temperature
and pressure.
EYE CONTACT鈥揘o harm expected.
EFFECTS OF REPEATED (CHRONIC) OVEREXPOSURE: Repeated hypoxia from CO exposure
will cause gradually increasing central nervous system (CNS) damage, with loss of sensation in the
fingers, poor memory, and mental deterioration. Chronic exposure may facilitate development of
atherosclerosis.
OTHER EFFECTS OF OVEREXPOSURE: Other effects include embryotoxicity, impaired
cardiovascular function, pulmonary edema, pneumonia, gross neuropsychiatric damage, memory
impairment, permanent CNS damage, and cerebral edema with irreversible brain damage. Late, fatal
demyelinization is a rare, but possible, complication.
MEDICAL CONDITIONS AGGRAVATED BY OVEREXPOSURE: Hypoxia from
carboxyhemoglobin formation may aggravate established coronary and cerebral circulatory insufficiency.
SIGNIFICANT LABORATORY DATA WITH POSSIBLE RELEVANCE TO HUMAN HEALTH
HAZARD EVALUATION: Carbon monoxide produces embryofetal toxicity in laboratory animals but
only at doses that cause maternal toxicity. There is no information available on possible effects in
humans.
CARCINOGENICITY: Carbon monoxide is not listed by NTP, OSHA, and IARC.
4. First Aid Measures
INHALATION: Immediately remove to fresh air. If not breathing, give artificial respiration with
supplemental oxygen given by qualified personnel. If breathing, qualified personnel should give oxygen.
Call a physician.
SKIN CONTACT: Wash with soap and water.
SWALLOWING: An unlikely route of exposure. This product is a gas at normal temperature and
pressure.
EYE CONTACT: An unlikely route of exposure. Flush 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: There is no specific antidote. Treatment of overexposure should be directed
at the control of symptoms and the clinical condition of the patient. Angina and depression of the ST
segment of the electrocardiogram indicates myocardial hypoxia. Exposure to high concentrations can
result in cerebral edema. With severe doses, the use of hyperbaric oxygen may be beneficial. Individuals
repeatedly overexposed may present positive Romberg's sign.
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Product: Carbon Monoxide P-4576-H Date: September 2004
5. Fire Fighting Measures
FLASH POINT (test method): Flammable gas Flammable gas
1128掳F (609掳C)
AUTOIGNITION TEMPERATURE:
FLAMMABLE LIMITS IN AIR, % by volume: LOWER: 12.5% UPPER: 74%
EXTINGUISHING MEDIA: CO2, dry chemical, water spray, or fog.
SPECIAL FIRE FIGHTING PROCEDURES: DANGER! Toxic, flammable, odorless high-
pressure gas. Evacuate all personnel from danger area. Do not approach area without self-contained
breathing apparatus and protective clothing. Immediately cool cylinders with water spray from maximum
distance, taking care not to extinguish flames. Remove ignition sources if without risk. If flames are
accidentally extinguished, explosive reignition may occur. Stop flow of gas if without risk, while
continuing cooling water spray. Remove all cylinders from area of fire if without risk. Allow fire to burn
out. On-site fire brigades must comply with OSHA 29 CFR 1910.156.
UNUSUAL FIRE AND EXPLOSION HAZARDS: Toxic, flammable gas. Cannot be detected by odor.
Forms explosive mixtures with air and oxidizing agents. Heat of fire can build pressure in cylinder and
cause it to rupture. No part of cylinder should be subjected to a temperature higher than 125掳F (52掳C).
Carbon monoxide cylinders are equipped with a pressure relief device. (Exceptions may exist where
authorized by DOT.) If leaking carbon monoxide catches fire, do not extinguish flames. Flammable and
toxic vapors may spread from leak and could explode if reignited by sparks or flames. Explosive
atmospheres may linger. Before entering area, especially confined areas, check with an appropriate
device.
HAZARDOUS COMBUSTION PRODUCTS: None known.
6. Accidental Release Measures
STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED: DANGER! Toxic,
flammable, odorless high-pressure gas. Cannot be detected by odor. Immediately evacuate all
personnel from danger area. Use self-contained breathing apparatus where needed. May form explosive
mixtures with air (see section 5). Toxic, flammable gas may spread. Before entering area, especially a
confined area, check atmosphere with an appropriate device. Remove all sources of ignition if without
risk. Reduce gas with fog or fine water spray. Shut off flow if without risk. Ventilate area or move
cylinder to well-ventilated area.
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. Separate
carbon monoxide cylinders from oxygen and other oxidizers 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 hr. 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. Post 鈥淣o Smoking or Open Flames鈥? signs in storage and use areas.
Page 3 of 8
Product: Carbon Monoxide P-4576-H Date: September 2004
There must be no sources of ignition. All electrical equipment in storage areas must be explosion-proof.
Storage areas must meet national electric codes for Class 1 hazardous areas.
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. Electrical equipment must be non-sparking
or explosion-proof. 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. For other
precautions in using carbon monoxide, see section 16.
For further information on storage, handling, and use of this product, see NFPA 55, Standard for the
Storage, Use, and Handling of Compressed and Liquefied Gases in Portable Cylinders, published by the
National Fire Protection Association.
8. Exposure Controls/Personal Protection
VENTILATION/ENGINEERING CONTROLS:
LOCAL EXHAUST鈥揢se an explosion-proof local exhaust system with sufficient air flow to keep
the carbon monoxide concentration below the TLVs in the worker鈥檚 breathing zone.
MECHANICAL (general)鈥揘ot recommended as a primary ventilation system to control worker鈥檚
exposure.
SPECIAL鈥揘one
OTHER鈥揘one
RESPIRATORY PROTECTION: Use an air-supplied respirator or a full-face, positive-pressure, self-
contained breathing apparatus. Respiratory protection must conform to OSHA 29 CFR 1910.134. Select
per OSHA 29 CFR 1910.134 and ANSI Z88.2.
SKIN PROTECTION: Wear work gloves when handling cylinders.
EYE PROTECTION: Wear safety glasses when handling cylinders. Select per OSHA 29 CFR
1910.133.
OTHER PROTECTIVE EQUIPMENT: Metatarsal shoes for cylinder handling and protective
clothing where needed. Select per OSHA 29 CFR 1910.132 and 1910.133. Regardless of protective
equipment, never touch live electrical parts.
9. Physical and Chemical Properties
28.01
MOLECULAR WEIGHT:
0.9676
SPECIFIC GRAVITY (Air = 1) at 70掳F (21.1掳C) and 1 atm:
0.0725 lb/ft3 (1.161 kg/m3)
GAS DENSITY at 68掳F (20掳C) and 1 atm:
0.035
SOLUBILITY IN WATER, vol/vol at 32掳F (0掳C) and 1 atm:
-312.7掳F (-191.5掳C)
BOILING POINT at 1 atm:
-340.6掳F (-207.0掳C)
MELTING POINT at 1 atm:
APPEARANCE, ODOR, AND STATE: Colorless, odorless gas at normal temperature and
pressure.
Page 4 of 8
Product: Carbon Monoxide P-4576-H Date: September 2004
10. Stability and Reactivity
Unstable Stable
STABILITY:
INCOMPATIBILITY (materials to avoid): Oxidizing agents, oxygen, flammables, metal oxides,
metals in the presence of moisture and/or sulfur compounds
HAZARDOUS DECOMPOSITION PRODUCTS: Carbon monoxide will decompose above 752掳F
(400掳C) to form carbon dioxide and carbon.
May Occur Will Not Occur
HAZARDOUS POLYMERIZATION:
CONDITIONS TO AVOID: Temperatures above 752掳F (400掳C)
11. Toxicological Information
LC50 = 3760 ppm, 1 hr, rat. See section 3.
12. Ecological Information
No information available on ecological effects. Carbon monoxide does not contain any Class I or Class II
ozone-depleting chemicals. Carbon monoxide 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, see section 6.
14. Transport Information
DOT/IMO SHIPPING NAME: Carbon monoxide, compressed
HAZARD PACKING IDENTIFICATION PRODUCT
2.3 GROUP/ZONE: NA/D UN 1016 RQ: None
CLASS: NUMBER:
POISON GAS, FLAMMABLE GAS*
SHIPPING LABEL(s):
PLACARD (when required): POISON GAS, FLAMMABLE GAS*
*The words in the POISON GAS diamond are INHALATION HAZARD.
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.
Additional Marking Requirement: Inhalation Hazard
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.
Page 5 of 8
Product: Carbon Monoxide P-4576-H Date: September 2004
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):
TPQ: None
EHS RQ: None
SECTIONS 311/312: Require submission of MSDSs and chemical inventory reporting with
identification of EPA hazard categories. The hazard categories for this product are as
follows:
IMMEDIATE: Yes PRESSURE: Yes
DELAYED: Yes REACTIVITY: No
FIRE: Yes
SECTION 313: Requires submission of annual reports of release of toxic chemicals that
appear in 40 CFR Part 372.
Carbon monoxide 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.
Carbon monoxide is not listed as a regulated substance.
TSCA: TOXIC SUBSTANCES CONTROL ACT: Carbon monoxide is listed on the TSCA
inventory.
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.
Carbon monoxide is not listed in Appendix A as a highly hazardous chemical; however, any
process that involves a flammable gas on site in one location in quantities of 10,000 lb (4536
kg) or more is covered under this regulation unless the gas is used as fuel.
STATE REGULATIONS:
CALIFORNIA: Carbon monoxide is listed by California under the SAFE DRINKING WATER
AND TOXIC ENFORCEMENT ACT OF 1986 (Proposition 65).
WARNING: Carbon monoxide is a chemical known to the State of California to cause birth
defects or other reproductive harm.
(California Health and Safety Code 搂25249.5 et seq.)
PENNSYLVANIA: Carbon monoxide is subject to the PENNSYLVANIA WORKER AND
COMMUNITY RIGHT-TO-KNOW ACT (35 P.S. Sections 7301-7320).
Page 6 of 8
Product: Carbon Monoxide P-4576-H Date: September 2004
16. Other Information
Be sure to read and understand all labels and instructions supplied with all containers of this product.
OTHER HAZARDOUS CONDITIONS OF HANDLING, STORAGE, AND USE: Toxic,
flammable, odorless high-pressure gas. Cannot be detected by odor. Harmful if inhaled. Use piping and
equipment adequately designed to withstand pressures to be encountered. May form explosive mixtures
with air. Keep away from heat, sparks, and open flame. Ground all equipment. Use only spark-proof
tools and explosion-proof equipment. Keep away from oxidizing agents and other flammables. Store and
use with adequate ventilation at all times. Use only in a closed system. Close valve after each use; keep
closed even when empty. Protect cylinders from direct sunlight. Never work on a pressurized system. If
a leak occurs, close the cylinder valve, blow the system down by venting vapor to a safe place in an
environmentally safe manner in compliance with all federal, state, and local laws; then repair the leak.
Follow safe practices when returning cylinder to supplier. Be sure valve is closed; then install valve
outlet plug tightly. Never place a compressed gas cylinder where it may become part of an electrical
circuit.
NOTE: Prior to using any plastics, confirm their compatibility with carbon monoxide. Avoid using pure
nickel. Corrosion of pure nickel in CO atmospheres exceeds 50 mil/yr (1.27 mm/yr) at room
temperatures.
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 8
Product: Carbon Monoxide P-4576-H Date: September 2004
HAZARD RATING SYSTEMS:
NFPA RATINGS: HMIS RATINGS:
=2 =1
HEALTH HEALTH
=4 =4
FLAMMABILITY FLAMMABILITY
=0 PHYSICAL HAZARD = 3
INSTABILITY
= None
SPECIAL
STANDARD VALVE CONNECTIONS FOR U.S. AND CANADA:
CGA-350 connection is standard
THREADED:
Not applicable
PIN-INDEXED YOKE:
ULTRA-HIGH-INTEGRITY CONNECTION: CGA-724 NOTE: Do not use a nickel gasket.
Use the proper CGA connections. DO NOT USE ADAPTERS. Additional limited-standard connections
may apply. See pamphlet CGA V-1 listed below.
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, http://www.cganet.com/Publication.asp.
AV-1 Safe Handling and Storage of Compressed Gases
P-1 Safe Handling of Compressed Gases in Containers
V-1 Compressed Gas Cylinder Valve Inlet and Outlet Connections
鈥? Handbook of Compressed Gases, Fourth Edition
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.
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 or download from www.praxair.com. 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 and the Flowing Airstream design 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 8 of 8
Printed in USA
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