Material Safety Data Sheet
Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Section 1. Chemical product and company identification
: Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Product Name
: AIRGAS INC., on behalf of its subsidiaries
Supplier
259 North Radnor-Chester Road
Suite 100
Radnor, PA 19087-5283
1-610-687-5253
: Synthetic/Analytical chemistry.
Product use
: 007341
MSDS#
Date of : 6/26/2007.
Preparation/Revision
: 1-866-734-3438
In case of emergency
Section 2. Hazards identification
: Gas.
Physical state
: Danger!
Emergency overview
MAY BE FATAL IF INHALED.
CONTENTS UNDER PRESSURE.
CAUSES SEVERE EYE IRRITATION.
CAUSES SKIN IRRITATION.
CONTAINS MATERIAL WHICH CAUSES DAMAGE TO THE FOLLOWING ORGANS:
BLOOD, LUNGS, REPRODUCTIVE SYSTEM, MUCOUS MEMBRANES,
RESPIRATORY TRACT, SKIN, CENTRAL NERVOUS SYSTEM, EYE, LENS OR
CORNEA, NOSE, SINUSES, THROAT.
POSSIBLE CANCER HAZARD
CONTAINS MATERIAL WHICH MAY CAUSE CANCER BASED ON ANIMAL DATA.
Avoid contact with skin and clothing. Do not breathe gas. Do not puncture or incinerate
container. Keep container closed. Use only with adequate ventilation. Wash thoroughly
after handling. Risk of cancer depends on duration and level of exposure.
Contact with rapidly expanding gases can cause frostbite.
: Inhalation,Dermal,Eyes
Routes of entry
Potential acute health effects
Severely irritating to the eyes.
Eyes :
Irritating to skin.
Skin :
Very toxic by inhalation.
Inhalation :
Ingestion is not a normal route of exposure for gases
:
Ingestion
CARCINOGENIC EFFECTS Classified A4 (Not classifiable for human or animal.) by
:
Potential chronic health :
ACGIH, 3 (Not classifiable for human.) by IARC [nitrous oxide].
effects
MUTAGENIC EFFECTS Not available.
:
TERATOGENIC EFFECTS Not available.
:
: Repeated exposure to a highly toxic material may produce general deterioration of health
Medical conditions
aggravated by overexposure by an accumulation in one or many human organs.
See toxicological Information (section 11)
Section 3. Composition, Information on Ingredients
Name CAS number % Volume Exposure limits
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Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Helium 7440-59-7 1 - 97.7
Nitrogen 7727-37-9 1 - 97.7
Nitric Oxide 10102-43-9 2.3 - 50 ACGIH TLV (United States, 9/2004). Notes:
Identifies substances identified in the BEI
documentation for Methemoglobin
inducers (for which methemoglobin is the
principle toxicity) and organophosphorous
cholinesterase inhibitors are part of this
notation.
TWA: 31 mg/m 3 8 hour(s). Form: All forms
TWA: 25 ppm 8 hour(s). Form: All forms
NIOSH REL (United States, 6/2001).
TWA: 30 mg/m 3 10 hour(s). Form: All forms
TWA: 25 ppm 10 hour(s). Form: All forms
OSHA PEL (United States, 6/1993).
TWA: 30 mg/m 3 8 hour(s). Form: All forms
TWA: 25 ppm 8 hour(s). Form: All forms
Nitrous Oxide 10024-97-2 0.005 - 20 ACGIH TLV (United States, 1/2004). Notes:
1996 Adoption Refers to Appendix A --
Carcinogens.
TWA: 90 mg/m 3 8 hour(s). Form: All forms
TWA: 50 ppm 8 hour(s). Form: All forms
NIOSH REL (United States, 12/2001). Notes:
TWA over the time exposed Note: REL for
exposure to waste anesthetic gas.
TWA: 46 mg/m 3 10 hour(s). Form: All forms
TWA: 25 ppm 10 hour(s). Form: All forms
Section 4. First aid measures
No action shall be taken involving any personal risk or without suitable training.If fumes are still suspected to be present,
the rescuer should wear an appropriate mask or a self-contained breathing apparatus.It may be dangerous to the person
providing aid to give mouth-to-mouth resuscitation.
: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes.
Eye contact
Get medical attention immediately.
: In case of contact, immediately flush skin with plenty of water for at least 15 minutes
Skin contact
while removing contaminated clothing and shoes. Wash clothing before reuse.
Thoroughly clean shoes before reuse. Get medical attention immediately.
: Try to warm up the frozen tissues and seek medical attention.
Frostbite
: If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is
Inhalation
difficult, give oxygen. Get medical attention immediately.
: Do NOT induce vomiting unless directed to do so by medical personnel. Never give
Ingestion
anything by mouth to an unconscious person. Get medical attention if symptoms
appear.
Section 5. Fire fighting measures
Flammability of the product : Non-flammable.
: These products are nitrogen oxides (NO, NO 2...).
Products of combustion
: Use an extinguishing agent suitable for surrounding fires.
Fire fighting media and
instructions
If involved in fire, shut off flow immediately if it can be done without risk. Apply water
from a safe distance to cool container and protect surrounding area.
No specific hazard.
: Fire fighters should wear appropriate protective equipment and self-contained breathing
Special protective
apparatus (SCBA) with a full facepiece operated in positive pressure mode.
equipment for fire-fighters
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Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Section 6. Accidental release measures
: Immediately contact emergency personnel. Keep unnecessary personnel away. Use
Personal precautions
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.
Section 7. Handling and storage
: Avoid contact with eyes, skin and clothing. Keep container closed. Use only with
Handling
adequate ventilation. Do not puncture or incinerate container. Wash thoroughly after
handling. High pressure gas. Use equipment rated for cylinder pressure. Close valve
after each use and when empty. Protect cylinders from physical damage; do not drag,
roll, slide, or drop. Use a suitable hand truck for cylinder movement.
: Keep container tightly closed. Keep container in a cool, well-ventilated area. Cylinders
Storage
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 癈
(125 癋).
Section 8. Exposure Controls, Personal Protection
: Use only with adequate ventilation. If user operations generate dust, fumes, vapor or
Engineering controls
mist, use process enclosures, local exhaust ventilation, or other engineering controls to
keep worker exposure to airborne contaminants below any recommended or statutory
limits.
Personal protection
: Safety eyewear complying with an approved standard should be used when a risk
Eyes
assessment indicates this is necessary to avoid exposure to liquid splashes, mists or
dusts.
: Personal protective equipment for the body should be selected based on the task being
Skin
performed and the risks involved and should be approved by a specialist before handling
this product.
: Use a properly fitted, air-purifying or air-fed respirator complying with an approved
Respiratory
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
: Chemical-resistant, impervious gloves or gauntlets complying with an approved standard
Hands
should be worn at all times when handling chemical products if a risk assessment
indicates this is necessary.
Personal protection in case : Full chemical resistant suit and self-contained breathing apparatus only by trained and
authorized persons.
of a large spill
Consult local authorities for acceptable exposure limits.
Section 9. Physical and chemical properties
Not applicable.
Molecular weight :
Not applicable.
Molecular formula :
Not available.
Boiling/condensation point :
-90.99癈 (-131.8癋) based on data for: nitrous oxide. Weighted average: -215.25癈
Melting/freezing point :
(-355.4癋)
The lowest known value is -146.9癈 (-232.4癋) (Nitrogen).
Critical temperature :
The highest known value is 1.53 (Air = 1) (nitrous oxide). Weighted average: 0.72 (Air
Vapor density :
= 1)
Specific Volume (ft3/lb) Not applicable.
:
Gas Density (lb/ft3) Weighted average: 0.02
:
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Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Section 10. Stability and reactivity
: The product is stable.
Stability and reactivity
Incompatibility with various : Highly reactive with alkalis, moisture.
substances
Section 11. Toxicological information
Ingredient name Test Result Route Species
Nitric Oxide LC50 115 ppm (1 hour Inhalation Rat
(s))
1068 mg/m 3 (4
LC50 Inhalation Rat
hour(s))
Chronic effects on humans : CARCINOGENIC EFFECTS Classified A4 (Not classifiable for human or animal.) by
:
ACGIH, 3 (Not classifiable for human.) by IARC [nitrous oxide].
Contains material which causes damage to the following organs: blood, lungs, the
reproductive system, mucous membranes, upper respiratory tract, skin, central nervous
system (CNS), eye, lens or cornea, nose/sinuses, throat.
: No specific information is available in our database regarding the other toxic effects of
Other toxic effects on
this material for humans.
humans
Specific effects
: Contains material which may cause cancer based on animal data. Risk of cancer
Carcinogenic effects
depends on duration and level of exposure.
: No known significant effects or critical hazards.
Mutagenic effects
: No known significant effects or critical hazards.
Reproduction toxicity
Section 12. Ecological information
: These products are nitrogen oxides (NO, NO 2...).
Products of degradation
: The products of degradation are less toxic than the product itself.
Toxicity of the products of
biodegradation
: Not available.
Environmental fate
: No known significant effects or critical hazards.
Environmental hazards
: Not available.
Toxicity to the environment
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 UN1955 COMPRESSED GAS, 2.3 Not applicable (gas). -
TOXIC, N.O.S. INHALATION
HAZARD
2
TDG Classification UN1955 COMPRESSED GAS, 2.3 Not applicable (gas). Explosive
TOXIC, N.O.S. Limit and
Limited
2
Quantity
Index
0
ERAP Index
0
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Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
Passenger
Carrying Ship
Index
Forbidden
Passenger
Carrying
Road or Rail
Index
Forbidden
UN1955 COMPRESSED GAS, 2.3 Not applicable (gas). -
Mexico
TOXIC, N.O.S.
Classification INHALATION
HAZARD
2
Section 15. Regulatory information
United States
: TSCA 8(b) inventory: Helium; nitric oxide; Nitrogen; nitrous oxide
U.S. Federal regulations
SARA 302/304/311/312 extremely hazardous substances: nitric oxide
SARA 302/304 emergency planning and notification: nitric oxide
SARA 302/304/311/312 hazardous chemicals: Helium; nitric oxide; Nitrogen; nitrous
oxide
SARA 311/312 MSDS distribution - chemical inventory - hazard identification: Helium:
Sudden Release of Pressure; nitric oxide: Sudden Release of Pressure, Immediate
(Acute) Health Hazard; Nitrogen: Sudden Release of Pressure; nitrous oxide: Fire
hazard, Sudden Release of Pressure, Delayed (Chronic) Health Hazard
Clean Water Act (CWA) 307: No products were found.
Clean Water Act (CWA) 311: No products were found.
Clean air act (CAA) 112 accidental release prevention: nitric oxide
Clean air act (CAA) 112 regulated flammable substances: No products were found.
Clean air act (CAA) 112 regulated toxic substances: nitric oxide
: Pennsylvania RTK: Helium: (generic environmental hazard); nitric oxide: (environmental
State regulations
hazard, generic environmental hazard); Nitrogen: (generic environmental hazard);
nitrous oxide: (generic environmental hazard)
Massachusetts RTK: Helium; nitric oxide; Nitrogen; nitrous oxide
New Jersey: Helium; nitric oxide; Nitrogen; nitrous oxide
Canada
: Class A: Compressed gas.
WHMIS (Canada)
Class D-1A: Material causing immediate and serious toxic effects (VERY TOXIC).
Class D-2A: Material causing other toxic effects (VERY TOXIC).
Class E: Corrosive gas.
CEPA DSL: Helium; nitric oxide; Nitrogen; nitrous oxide
Section 16. Other information
United States
: MAY BE FATAL IF INHALED.
Label Requirements
CONTENTS UNDER PRESSURE.
CAUSES SEVERE EYE IRRITATION.
CAUSES SKIN IRRITATION.
CONTAINS MATERIAL WHICH CAUSES DAMAGE TO THE FOLLOWING ORGANS:
BLOOD, LUNGS, REPRODUCTIVE SYSTEM, MUCOUS MEMBRANES,
RESPIRATORY TRACT, SKIN, CENTRAL NERVOUS SYSTEM, EYE, LENS OR
CORNEA, NOSE, SINUSES, THROAT.
POSSIBLE CANCER HAZARD
CONTAINS MATERIAL WHICH MAY CAUSE CANCER BASED ON ANIMAL DATA.
Canada
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Toxic Nonflammable Gas Mixture: Helium / Nitric Oxide / Nitrogen / Nitrous Oxide
: Class A: Compressed gas.
Label Requirements
Class D-1A: Material causing immediate and serious toxic effects (VERY TOXIC).
Class D-2A: Material causing other toxic effects (VERY TOXIC).
Class E: Corrosive gas.
*3
Hazardous Material : Health
Information System (U.S.A.)
0
Fire hazard
0
Reactivity
C
Personal protection
National Fire Protection :
Flammability
0
Association (U.S.A.)
3 0
Health 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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