Material Safety Data Sheet

Carbon Monoxide

Section 1. Chemical product and company identification

Product name : Carbon Monoxide
Supplier : AIRGAS INC., on behalf of its subsidiaries
259 North Radnor-Chester Road
Suite 100
Radnor, PA 19087-5283
1-610-687-5253
Product use : Synthetic/Analytical chemistry.
Synonym : Carbon oxide (CO); CO; Exhaust Gas; Flue gas; Carbonic oxide; Carbon oxide;
Carbone; Carbonio; Kohlenmonoxid; Kohlenoxyd; Koolmonoxyde; NA 9202; Oxyde de
carbone; UN 1016; Wegla tlenek; Flue gasnide; Carbon monooxide
MSDS # : 001014
Date of : 12/3/2012.
Preparation/Revision
In case of emergency : 1-866-734-3438

Section 2. Hazards identification

Physical state : Gas. [[COLORLESS GAS, MAY BE A LIQUID AT LOW TEMPERATURE OR HIGH
PRESSURE.]]
Emergency overview : WARNING!
FLAMMABLE GAS.
MAY CAUSE FLASH FIRE.
MAY BE FATAL IF INHALED.
MAY CAUSE TARGET ORGAN DAMAGE, BASED ON ANIMAL DATA.
CONTENTS UNDER PRESSURE.
Keep away from heat, sparks and flame. Do not puncture or incinerate container. Avoid
breathing gas. May cause target organ damage, based on animal data. Use only with
adequate ventilation. Keep container closed.
Contact with rapidly expanding gases can cause frostbite.
Target organs : May cause damage to the following organs: blood, lungs, the nervous system, heart,
cardiovascular system, central nervous system (CNS).
Routes of entry : Inhalation
Potential acute health effects
Eyes : Contact with rapidly expanding gas may cause burns or frostbite.
Skin : Contact with rapidly expanding gas may cause burns or frostbite.
Inhalation : Toxic by inhalation.
Ingestion : Ingestion is not a normal route of exposure for gases
Potential chronic health effects
Chronic effects : May cause target organ damage, based on animal data.
Target organs : May cause damage to the following organs: blood, lungs, the nervous system, heart,
cardiovascular system, central nervous system (CNS).

Medical conditions : Pre-existing disorders involving any target organs mentioned in this MSDS as being at
aggravated by over- risk may be aggravated by over-exposure to this product.
exposure
See toxicological information (Section 11)

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Section 3. Composition, Information on Ingredients

Name CAS number % Volume Exposure limits
Carbon Monoxide 630-08-0 100 ACGIH TLV (United States, 2/2010).
TWA: 29 mg/m³ 8 hour(s).
TWA: 25 ppm 8 hour(s).
NIOSH REL (United States, 6/2009).
CEIL: 229 mg/m³
CEIL: 200 ppm
TWA: 40 mg/m³ 10 hour(s).
TWA: 35 ppm 10 hour(s).
OSHA PEL (United States, 6/2010).
TWA: 55 mg/m³ 8 hour(s).
TWA: 50 ppm 8 hour(s).
OSHA PEL 1989 (United States, 3/1989).
CEIL: 229 mg/m³
CEIL: 200 ppm
TWA: 40 mg/m³ 8 hour(s).
TWA: 35 ppm 8 hour(s).

Section 4. First aid measures

No action shall be taken involving any personal risk or without suitable training.If it is suspected that fumes are still present,
the rescuer should wear an appropriate mask or self-contained breathing apparatus.It may be dangerous to the person
providing aid to give mouth-to-mouth resuscitation.
Eye contact : Check for and remove any contact lenses. Immediately flush eyes with plenty of water
for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical
attention immediately.
Skin contact : In case of contact, immediately flush skin with plenty of water for at least 15 minutes
while removing contaminated clothing and shoes. To avoid the risk of static discharges
and gas ignition, soak contaminated clothing thoroughly with water before removing it.
Wash clothing before reuse. Clean shoes thoroughly before reuse. Get medical
attention immediately.
Frostbite : Try to warm up the frozen tissues and seek medical attention.
Inhalation : Move exposed person to fresh air. If not breathing, if breathing is irregular or if
respiratory arrest occurs, provide artificial respiration or oxygen by trained personnel.
Loosen tight clothing such as a collar, tie, belt or waistband. Get medical attention
immediately.
Ingestion : As this product is a gas, refer to the inhalation section.

Section 5. Fire-fighting measures

Flammability of the product :
Flammable.
Auto-ignition temperature :
605°C (1121°F)
Flammable limits :
Lower: 12.5% Upper: 74.2%
Products of combustion :
Decomposition products may include the following materials:
carbon dioxide
carbon monoxide
Fire hazards in the presence : Extremely flammable in the presence of the following materials or conditions: open
of various substances flames, sparks and static discharge and oxidizing materials.
Fire-fighting media and : In case of fire, use water spray (fog), foam or dry chemical.
instructions
In case of fire, allow gas to burn if flow cannot be shut off immediately. Apply water from
a safe distance to cool container and protect surrounding area. If involved in fire, shut
off flow immediately if it can be done without risk.
Contains gas under pressure. Flammable gas. In a fire or if heated, a pressure
increase will occur and the container may burst, with the risk of a subsequent explosion.
Special protective : Fire-fighters should wear appropriate protective equipment and self-contained breathing
equipment for fire-fighters apparatus (SCBA) with a full face-piece operated in positive pressure mode.

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Section 6. Accidental release measures

Personal precautions : Immediately contact emergency personnel. Keep unnecessary personnel away. Use
suitable protective equipment (section 8). Shut off gas supply if this can be done safely.
Isolate area until gas has dispersed.
Environmental precautions : Avoid dispersal of spilled material and runoff and contact with soil, waterways, drains
and sewers.
Methods for cleaning up : Immediately contact emergency personnel. Stop leak if without risk. Use spark-proof
tools and explosion-proof equipment. Note: see section 1 for emergency contact
information and section 13 for waste disposal.

Section 7. Handling and storage

Handling : Use only with adequate ventilation. Use explosion-proof electrical (ventilating, lighting
and material handling) equipment. High pressure gas. Do not puncture or incinerate
container. Use equipment rated for cylinder pressure. Close valve after each use and
when empty. Keep container closed. Keep away from heat, sparks and flame. To avoid
fire, eliminate ignition sources. Protect cylinders from physical damage; do not drag, roll,
slide, or drop. Use a suitable hand truck for cylinder movement.
Storage : Keep container in a cool, well-ventilated area. Keep container tightly closed and sealed
until ready for use. Avoid all possible sources of ignition (spark or flame). Segregate
from oxidizing materials. Cylinders should be stored upright, with valve protection cap in
place, and firmly secured to prevent falling or being knocked over. Cylinder temperatures
should not exceed 52 °C (125 °F).

Section 8. Exposure controls/personal protection

Engineering controls : Use only with adequate ventilation. Use process enclosures, local exhaust ventilation or
other engineering controls to keep worker exposure to airborne contaminants below any
recommended or statutory limits. The engineering controls also need to keep gas, vapor
or dust concentrations below any lower explosive limits. Use explosion-proof ventilation
equipment.
Personal protection
Eyes : Safety eyewear complying with an approved standard should be used when a risk
assessment indicates this is necessary to avoid exposure to liquid splashes, mists or
dusts.
Skin : Personal protective equipment for the body should be selected based on the task being
performed and the risks involved and should be approved by a specialist before handling
this product.
Respiratory : Use a properly fitted, air-purifying or air-fed respirator complying with an approved
standard if a risk assessment indicates this is necessary. Respirator selection must be
based on known or anticipated exposure levels, the hazards of the product and the safe
working limits of the selected respirator.
The applicable standards are (US) 29 CFR 1910.134 and (Canada) Z94.4-93
Hands : Chemical-resistant, impervious gloves complying with an approved standard should be
worn at all times when handling chemical products if a risk assessment indicates this is
necessary.
Personal protection in case : Self-contained breathing apparatus (SCBA) should be used to avoid inhalation of the
of a large spill product. Full chemical-resistant suit and self-contained breathing apparatus should be
worn only by trained and authorized persons.
Product name
carbon monoxide ACGIH TLV (United States, 2/2010).
TWA: 29 mg/m³ 8 hour(s).
TWA: 25 ppm 8 hour(s).
NIOSH REL (United States, 6/2009).
CEIL: 229 mg/m³
CEIL: 200 ppm
TWA: 40 mg/m³ 10 hour(s).
TWA: 35 ppm 10 hour(s).
OSHA PEL (United States, 6/2010).
TWA: 55 mg/m³ 8 hour(s).
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Carbon Monoxide

TWA: 50 ppm 8 hour(s).

OSHA PEL 1989 (United States, 3/1989).
CEIL: 229 mg/m³
CEIL: 200 ppm
TWA: 40 mg/m³ 8 hour(s).
TWA: 35 ppm 8 hour(s).

Consult local authorities for acceptable exposure limits.

Section 9. Physical and chemical properties

Molecular weight : 28.01 g/mole
Molecular formula : C-O
Boiling/condensation point : -191°C (-311.8°F)
Melting/freezing point : -205°C (-337°F)
Critical temperature : -140.1°C (-220.2°F)
Vapor density : 0.97 (Air = 1)
Specific Volume (ft 3/lb) : 13.8889
Gas Density (lb/ft 3) : 0.072

Section 10. Stability and reactivity

Stability and reactivity : The product is stable.
Incompatibility with various : Extremely reactive or incompatible with the following materials: oxidizing materials.
substances
Hazardous decomposition : Under normal conditions of storage and use, hazardous decomposition products should
products not be produced.
Hazardous polymerization : Under normal conditions of storage and use, hazardous polymerization will not occur.

Section 11. Toxicological information

Toxicity data
Product/ingredient name Result Species Dose Exposure
carbon monoxide TDLo Intraperitoneal Rat 35 mL/kg -
LC50 Inhalation Rat 13500 mg/m3 15 minutes
Vapor
LC50 Inhalation Rat 1900 mg/m3 4 hours
Vapor
LC50 Inhalation Rat 6600 ppm 30 minutes
Gas.
LC50 Inhalation Rat 3760 ppm 1 hours
Gas.
LC50 Inhalation Mouse 2444 ppm 4 hours
Gas.
LC50 Inhalation Rat 1807 ppm 4 hours
Gas.
IDLH : 1200 ppm
Chronic effects on humans : TERATOGENIC EFFECTS: Classified 1 by European Union.
May cause damage to the following organs: blood, lungs, the nervous system, heart,
cardiovascular system, central nervous system (CNS).
Other toxic effects on : No specific information is available in our database regarding the other toxic effects of
humans this material to humans.
Specific effects
Carcinogenic effects : No known significant effects or critical hazards.
Mutagenic effects : No known significant effects or critical hazards.
Reproduction toxicity : No known significant effects or critical hazards.

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Section 12. Ecological information

Aquatic ecotoxicity
Not available.
Products of degradation : Products of degradation: carbon oxides (CO, CO2).
Environmental fate : Not available.
Environmental hazards : No known significant effects or critical hazards.
Toxicity to the environment : Not available.

Section 13. Disposal considerations

Product removed from the cylinder must be disposed of in accordance with appropriate Federal, State, local
regulation.Return cylinders with residual product to Airgas, Inc.Do not dispose of locally.

Section 14. Transport information

Regulatory UN number Proper shipping Class Packing group Label Additional
information name information

DOT Classification UN1016 CARBON 2.3 Not applicable (gas). Inhalation

MONOXIDE, hazard zone D
COMPRESSED
Limited
quantity
Yes.

Packaging
instruction
Passenger
aircraft
Quantity
limitation:
Forbidden.

Cargo aircraft
Quantity
limitation:
25 kg

Special
provisions
4

TDG Classification UN1016 CARBON 2.3 Not applicable (gas). Explosive

MONOXIDE, Limit and
COMPRESSED Limited
Quantity
Index
0

ERAP Index
500

Passenger
Carrying Ship
Index
Forbidden

Passenger
Carrying
Road or Rail
Index
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Forbidden

Mexico UN1016 CARBON 2.3 Not applicable (gas). -

Classification MONOXIDE,
COMPRESSED

“Refer to CFR 49 (or authority having jurisdiction) to determine the information required for shipment of the
product.”

Section 15. Regulatory information

United States
U.S. Federal regulations : TSCA 8(a) IUR: Not determined
United States inventory (TSCA 8b): This material is listed or exempted.
SARA 302/304/311/312 extremely hazardous substances: No products were found.
SARA 302/304 emergency planning and notification: No products were found.
SARA 302/304/311/312 hazardous chemicals: carbon monoxide
SARA 311/312 MSDS distribution - chemical inventory - hazard identification:
carbon monoxide: Fire hazard, Sudden release of pressure, Immediate (acute) health
hazard, Delayed (chronic) health hazard

State regulations : Connecticut Carcinogen Reporting: This material is not listed.

Connecticut Hazardous Material Survey: This material is not listed.
Florida substances: This material is not listed.
Illinois Chemical Safety Act: This material is not listed.
Illinois Toxic Substances Disclosure to Employee Act: This material is not listed.
Louisiana Reporting: This material is not listed.
Louisiana Spill: This material is not listed.
Massachusetts Spill: This material is not listed.
Massachusetts Substances: This material is listed.
Michigan Critical Material: This material is not listed.
Minnesota Hazardous Substances: This material is not listed.
New Jersey Hazardous Substances: This material is listed.
New Jersey Spill: This material is not listed.
New Jersey Toxic Catastrophe Prevention Act: This material is listed.
New York Acutely Hazardous Substances: This material is not listed.
New York Toxic Chemical Release Reporting: This material is not listed.
Pennsylvania RTK Hazardous Substances: This material is listed.
Rhode Island Hazardous Substances: This material is not listed.

California Prop. 65 : WARNING: This product contains a chemical known to the State of California to cause
birth defects or other reproductive harm.
Ingredient name Cancer Reproductive No significant risk Maximum
level acceptable dosage
level
Carbon Monoxide No. Yes. No. No.
Canada
WHMIS (Canada) : Class A: Compressed gas.
Class B-1: Flammable gas.
Class D-1A: Material causing immediate and serious toxic effects (Very toxic).
Class D-2A: Material causing other toxic effects (Very toxic).

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CEPA Toxic substances: This material is not listed.

Canadian ARET: This material is not listed.
Canadian NPRI: This material is listed.
Alberta Designated Substances: This material is not listed.
Ontario Designated Substances: This material is not listed.
Quebec Designated Substances: This material is not listed.

Section 16. Other information

United States
Label requirements : FLAMMABLE GAS.
MAY CAUSE FLASH FIRE.
MAY BE FATAL IF INHALED.
MAY CAUSE TARGET ORGAN DAMAGE, BASED ON ANIMAL DATA.
CONTENTS UNDER PRESSURE.
Canada
Label requirements : Class A: Compressed gas.
Class B-1: Flammable gas.
Class D-1A: Material causing immediate and serious toxic effects (Very toxic).
Class D-2A: Material causing other toxic effects (Very toxic).

Hazardous Material : Health * 2

Information System (U.S.A.)
Flammability 4
Physical hazards 0

National Fire Protection :

4 Flammability
Association (U.S.A.)
Health 3 0 Instability
Special

Notice to reader
To the best of our knowledge, the information contained herein is accurate. However, neither the above-named
supplier, nor any of its subsidiaries, assumes any liability whatsoever for the accuracy or completeness of the
information contained herein.
Final determination of suitability of any material is the sole responsibility of the user. All materials may present
unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot
guarantee that these are the only hazards that exist.

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