MATERIAL
Linde Gas LLC (216) 642-6600
Linde Gas LLC
AGsA GAS, INC. (216) 642-6600
s SAFETY
P.O. Box 94737
P.O. Box 94737 WOODS BLVD
6055 ROCKSIDE DATA SHEET
Cleveland, Ohio 44101
Cleveland,94737 44101
P.O. BOX Ohio
www.us.lindegas.com
www.us.lindegas.com
CLEVELAND, OH 44101-4737 No. 186
NO = 10102-43-9; CO2 = 124-38-9
PRODUCT NAME CAS #
MISON®2 He 20 He = 7440-59-7 Ar= 7440-37-1
DOT I.D. No.:
UN 1956
TRADE NAME AND SYNONYMS
Compressed Gas, n.o.s. (DOT)
DOT Hazard Class:
Division 2.2
CHEMICAL NAME AND SYNONYMS
<.03 Molar % Nitric Oxide, 2 Molar % Carbon Dioxide and <.03 Molar % NO, 2 Molar % CO2 & 20 Molar % &
Formula
20 Molar % Helium in Argon
20 Molar % He in Ar
ISSUE DATES AND REVISIONS Chemical Family:
Welding or Welding Shielding Gas Mixture
1 November 2002
HEALTH HAZARD DATA
TIME WEIGHTED AVERAGE EXPOSURE LIMIT
Nitric Oxide TWA = 25 Molar PPM with a BEI Notation; Carbon Dioxide TWA= 5,000 Molar PPM. Its STEL is 30,000
Molar PPM. (Continued on pg. 4)
SYMPTOMS OF EXPOSURE
Concentrations of 20 - 30 percent of this mixture when inhaled with adequate oxygen in the air will cause an increase
in the respiratory rate. Higher concentration will cause headache, nausea and eventual unconsciousness.
TOXICOLOGICAL PROPERTIES
The amount of Nitric Oxide in this mixture should not present a toxicological problem, however Carbon Dioxide is the most powerful
cerebral vasodilator known. Inhaling large concentrations causes rapid circulatory insufficiency leading to coma and death. Chronic
harmful effects are not known from repeated inhalation of low (20-30%) concentrations of this product.
Neither Nitric Oxide, Carbon Dioxide, Helium or Argon are listed in the IARC , NTP or by OSHA as a carcinogen or potential
carcinogen.
Persons in ill health where such illness would be aggravated by exposure to this mixture should not be allowed to work with or
handle this product.
RECOMMENDED FIRST AID TREATMENT
PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE TO THIS MIXTURE.
RESCUE PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS.
Inhalation: Conscious persons should be assisted to an uncontaminated area and inhale fresh air. Quick removal
from the contaminated area is most important. Unconscious persons should be moved to an uncontaminated
area, given assisted respiration and supplemental oxygen. Further treatment should be symptomatic and supportive.
Information contained in this material safety data sheet is offered without charge for use by technically qualified personnel at their discretion and
risk. All statements, technical information and recommendations contained herein are based on tests and data which we believe to be reliable, but
the accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto. This information is not intended
as a license to operate under or a recommendation to practice or infringe any patent of this Company or others covering any process, composition
of matter or use.
Since the Company shall have no control of the use of the product described herein, the Company assumes no liability for loss or damage incurred
from the proper or improper use of such product.
MISON®2 He 20
HAZARDOUS MIXTURES OF OTHER LIQUIDS, SOLIDS, OR GASES
None.
PHYSICAL DATA
BOILING POINT LIQUID DENSITY AT BOILING POINT
See Page 4. See Page 4.
See Page 4.
VAPOR PRESSURE GAS DENSITY AT 70ºF. 1 atm
.0850 lb/ft3 (1.362 kg/m3)
SOLUBILITY IN WATER FREEZING POINT
See Page 4. See Page 4.
EVAPORATION RATE SPECIFIC GRAVITY (AIR=1)
N/A (Gas) @ 70ºF (21.1ºC) = 1.13
Colorless gas with very slight acidic odor.
APPEARANCE AND ODOR
FIRE AND EXPLOSION HAZARD DATA
AUTO IGNITION TEMPERATURE
FLASH POINT (Method used) FLAMMABLE LIMITS % BY VOLUME
N/A N/A N/A N/A
LEL UEL
ELECTRICAL CLASSIFICATION
EXTINGUISHING MEDIA
Nonhazardous
Nonflammable Gas Mixture
SPECIAL FIRE FIGHTING PROCEDURES
If cylinders are involved in a fire, safely relocate or keep cool with water spray.
UNUSUAL FIRE AND EXPLOSION HAZARDS
None.
REACTIVITY DATA
STABILITY CONDITIONS TO AVOID
Unstable None
Stable X
INCOMPATIBILITY (Materials to avoid) None.
HAZARDOUS DECOMPOSITION PRODUCTS None.
HAZARDOUS POLYMERIZATION CONDITIONS TO AVOID
May Occur
None
Will Not Occur X
SPILL OR LEAK PROCEDURES
STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED
Evacuate all personnel from affected area. Use appropriate protective equipment. If leak is in container or container
valve, contact your closest supplier location or call the emergency telephone number listed herein.
WASTE DISPOSAL METHOD
Do not attempt to dispose of waste or unused quantities. Return in the shipping container properly labeled, with any
valve outlet plugs or caps secured and valve protection cap in place to your supplier. For emergency disposal
assistance, contact your closest supplier location or call the emergency telephone number listed herein.
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MISON®2 He 20
SPECIAL PROTECTION INFORMATION
Positive pressure air line with mask or self-contained breathing apparatus should be available for
RESPIRATORY PROTECTION
(Specify type)
emergency use. (Continued on Page 4)
VENTILATION LOCAL EXHAUST SPECIAL
N/A
See Page 4.
See Local Exhaust MECHANICAL (Gen.) OTHER
N/A
N/A
PROTECTIVE GLOVES
As required when welding. See Other Protective Equipment.
EYE PROTECTION
See Page 4.
OTHER PROTECTIVE EQUIPMENT
See Page 5.
SPECIAL PRECAUTIONS*
SPECIAL LABELING INFORMATION
I.D. No.: UN 1956
DOT Shipping Name: Compressed Gas, n.o.s.
DOT Hazard Class: Division 2.2
DOT Shipping Label: Nonflammable Gas
SPECIAL HANDLING RECOMMENDATIONS
Use only in well-ventilated areas. Valve protection caps must remain in place unless cylinder is secured with valve
outlet piped to use point. Do not drag, slide or roll cylinders. Use a suitable hand truck for cylinder movement. Use a
pressure reducing regulator when connecting cylinder to lower pressure (<3,000 psig) piping or systems. Do not heat
cylinder by any means to increase the discharge rate of product from cylinder. Use a check valve or trap in the
discharge line to prevent hazardous back flow into the cylinder.
For additional handling recommendations, consult Compressed Gas Association’s Pamphlets P-1, P-9, P-14
and Safety Bulletin SB-2.
SPECIAL STORAGE RECOMMENDATIONS
Protect cylinders from physical damage. Store in cool, dry, well-ventilated area away from heavily trafficked areas and
emergency exits. Do not allow the temperature where the cylinders are stored to exceed 125ºF (52ºC). Cylinders
should be stored upright and firmly secured to prevent falling or being knocked over. Full and empty cylinders should
be segregated. Use a “first in - first out� inventory system to prevent full cylinders being stored for excessive periods
of time.
For additional storage recommendations, consult Compressed Gas Association’s Pamphlets P-1, P-9, P-14, and Safety
Bulletin SB-2.
SPECIAL PACKAGING RECOMMENDATIONS
This mixture is noncorrosive and may be used with any common structural materials.
OTHER RECOMMENDATIONS OR PRECAUTIONS
Compressed gas cylinders should not be refilled except by qualified producers of compressed gases. Shipment of a
compressed gas cylinder which has not been filled by the owner or with his (written) consent is a violation of Federal
Law (49CFR). Always secure cylinders in an upright position before transporting them. NEVER transport cylinders in
trunks of vehicles, enclosed vans, truck cabs or in passenger compartments. Transport cylinders secured in open
flatbed or in open pick-up type vehicles.
Reporting under SARA, Title III, Section 313 not required. NFPA 704 NO. for this mixture: 1 0 0 None
*Various Government Agencies (i.e. Department of Transportation, Occupational Safety and Health Administration, Food and Drug Administration
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and others) may have specific regulations concerning the transportation, handling, storage or use of this product which will not be reflected in this
data sheet. The customer should review these regulations to ensure that he is in full compliance.
MISON®2 He 20
HEALTH HAZARD DATA
Time Weighted Average Exposure Limit (Continued):
Helium and Argon are simple asphyxiants (ACGIH 2001). Oxygen levels should be maintained at greater than 18 Molar
% at normal atmospheric pressure (p02>135 torr). Nitric Oxide PEL (8 hr. TWA) = 25 Molar PPM,
Carbon Dioxide = 5,000 Molar PPM with no listing for helium or argon (OSHA 2001).
PHYSICAL DATA
Boiling Point: NO = -241.2°F (-151.9°C)
CO2 Sublimation Point = -109.3°F (-78.5°C)
Ar = -302.6°F (-185.9°C)
He = -452.1°F (-268.9°C)
= 81.2 lb/ft3 (1300 kg/m3)
Liquid Density at Boiling Point: NO
= 97.5 lb/ft3 (1562 kg/m3)
CO2 Solid Density
= 87.1 lb/ft3 (1393 kg/m3)
Ar
= 7.8 lb/ft3 (124.9 kg/m3)
He
Vapor Pressure @ 70°F (21.1°C):
NO = Above the critical temperature of -135.4F (-93°C)
CO2 = 856 psia (5900 kPa)
Ar = Above the critical temperature of -188.1°F (-122.3°C)
He = Above the critical temperature of -450.2°F (-267.9°C)
Solubility in Water: NO = Negligible
CO2 = Soluble
Ar = Negligible
He = Negligible
Freezing Point: NO = -262.5°F (-163.6°C)
CO2 = -69.8°F (-56.6°C) @ 75.1 psia (518 kPa)
Ar = -308.9°F (-189.4°C)
He Pt. = -455.8°F (-271.°C)
SPECIAL PROTECTION INFORMATION:
Respiratory Protection (Continued):
When welding in confined space or where local exhaust or ventilation does not keep exposure below welding fume TLV,
use positive pressure air line with mask or self-contained breathing apparatus.
Local Exhaust:
To prevent accumulation of high concentrations of gases so as to reduce the oxygen level in the air to less than 18 molar
percent. When welding, use enough ventilation, local exhaust at the arc, or both, to keep the welding fumes and gases
below the applicable TLV’s in the worker’s breathing zone and the general area. Train the welder to keep his head out of
the fumes.
Eye Protection:
Safety goggles or glasses. When welding, wear helmet or use face shield with filter lens. As a general rule, start with a
shade which is too dark to see the weld zone. Then go to the next lighter shade which gives sufficient view of the weld
zone. Provide protection screens and flash goggles, if necessary, to shield others from arc rays radiation which can
injur eyes and burn skin.
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MISON®2 He 20
SPECIAL PROTECTION INFORMATION:
Other Protective Equipment:
Safety shoes and appropriate head and eye protection when welding. When welding, wear head, hand and body
protection which help to prevent injury from radiation, sparks and electrical shock. See ANSI Z-49.1. At a minimum, this
includes welder’s gloves and a protective face shield and may include arm protectors, aprons, hats, shoulder protection,
as well as dark substantial clothing. Train the welder not to touch live electrical parts and to insulate himself from work
and ground.
CAUTION: Welding or brazing may produce fumes and gases hazardous to health. Short-term (acute) overexposure to
welding fumes may result in discomfort such as: dizziness, nausea, or dryness or irritation of nose, throat or eyes. Long-
term (chronic) overexposure may lead to siderosis (iron deposits in the lungs) and is believed by some investigators to
affect pulmonary function. Arc rays can injure eyes and burn skin. Electric shock can kill. Avoid breathing these fumes
and gases. Use adequate ventilation. See ANSI Z-49.1. “Safety in Welding and Cutting� published by the American
Welding Society.
Consult hazard warnings on boxes or containers (or on tags or labels thereon) containing brazing or welding filler metals,
fluxes and fusible granular materials. See OSHA safety regulations under 29CFR 1910.252 “Welding, Cutting and
Brazing�. Also see “ACGIH (2001) TLVs® and BEIs®, Appendix B2. Welding Fumes--Total Particulates (not otherwise
classified): TLV-TWA, 5 mg/m3� for further information.
Consult manufacturer's material safety data sheet on welding consumables and related products for reactivity and health
hazard data, and for further information regarding welding fumes.
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