MATERIAL SAFETY DATA SHEET

IDENTIFICATION:
Name:
AUTOFROST (R-406A) or Autofrost-X3

Chemical Family:
Halogenated Hydrocarbons + Paraffinic Hydrocarbons
Formula:
Mixture of i-C4H10 / CH3CClF2 / CHClF2 

Synonyms:
Methyl propane / R-142b or Isotron-142b or chlorodifluoroethane or HCFC-142b /
R-22 or Freon-22 or Genetron-22 or HCFC-22 / R-600a / R-406a / McCool R-406A
CAS Name:					CAS Registry No.
Isobutane					75-28-5
1-Chloro-1,1-difluoroethane			75-68-3
Chlorodifluoromethane				75-45-6

Manufacturer / Distributor:
Peoples Welding Supply, Inc
426 Brown St Levee
W. Lafayette, In 47906
(765) 743-3839
Emergency phone (24 hr): (800) 535-5053 or  (800) 463-2672 or (800) 969-4062

PHYSICAL DATA:
Boiling (bubble) point:   -26.23 F      	Percent volatile by volume: 100
Boiling (dew) point: -10.05 F   		Mol. Wt:  89.87
Density (liquid 70 F) 70.27 LB/FT3              Pressure: 95 PSIA @  70 F
Vapor Density (Air = 1): @ 70F 1.29 LB/FT3      Solubility in H2O: slight
pH Information: Neutral                         Freezing point: Not Established
Appearance and odor:
Colorless liquified gas with faint etheral odor

HAZARDOUS COMPONENTS
Material(s):					Approximate weight % :
Isobutane					4
chlorodifluoroethane (R-142b)			41
chlorodifluoromethane (R-22)			55

HAZARDOUS REACTIVITY
Stability:
Material is stable.  However, avoid open flames and high temperatures.
Incompatibility (materials to avoid):
Strong oxidants, including oxygen.
Freshly scraped aluminum, Alkali metals, and Alkali earth metals 
(sodium, magnesium, etc), may cause exothermic reaction.  Aluminum
in refrigeration systems contains an oxide/chloride coating, so
it does not react.

Hazardous decomposition products:
May decompose at high temperatures (above 400F - 500F), and from contact with 
hot metal, heating elements, pilot lights, internal combustion engines, and
open flames.  Decomposition products may include hydrofluoric and hydrochloric
acids, chlorine, fluorine, possibly phosgene, carbon dioxide, and 
carbon monoxide.
Polymerization:
Will not occur. 

FIRE AND EXPLOSION DATA:
Flash Point:
NONE
Autoignition temperature:
N/A
Autodecompisition Temperature:
400 - 500F or above

Fire and Explosion:
Cylinders may vent or rupture in fire conditions, leading to decomposition.
Extinguishing Media:
Water spray.

Special Fire Fighting Instructions:
Use self-contained breathing apparatus.  Use water spray to cool cylinders
to prevent bursting or venting under fire conditions.
Product may be flammable if mixed with large quantities of air at greater
than atmospheric pressure.
If cylinders of product have been leaking (vapor leak), the remaining product
may become weakly flammable.  Heat of combustion is around 1/10 of 
that of hydrocarbon gasses, but no flash point.
Cylinders of USED refrigerant, may contain large amounts of refrigeration
(mineral) oil. A liquid leak or cylinder venting in a fire will bring out
a cloud of oil mist.  This oil mist can be very flammable (in the order of
gasoline).

HEALTH HAZARD INFORMATION
Principle Health Hazards:
Inhalation:  Vapor is heavier than air and can cause suffocation by displacing
oxygen available for breathing.  Contact with liquid may cause frostbite.

Breathing high concentrations of vapor may cause light headedness, giddiness,
shortness of breath, and may lead to narcosis, cardiac irregularities,
unconscienceness or death.  May cause eye irritation.

Toxicity /  Exposure limits:
OSHA and ACGIH	Not established, but reccommend 	TWA 1000 PPM.

Isobutane.
Humans exposed to Isobutane, 500 PPM, 8 hours/day, 5 days/week, for 4 weeks,
showed no cardiac, pulmonary or other functional abnormalities.

Chlorodifluoroethane.
Inhalation - Rat - 4 HR LC50 = 128,000 PPM.

Chlorodifluoromethane.
Low in toxicity at concentrations as high as 4% (40,000 ppm).  Narcotic
effects have been seen at 200,000 ppm.  Heart efficiency (animal studies)
has been reported to be reduced at concentrations of over 25,000 ppm.
Cardiac sensitization to epinephrine has been observed at concentrations
of 50,000 ppm.

First Aid
Inhalation:  Remove to fresh air, call a physician.  If not breathing, give
artificial respiration.  If breathing is difficult, give oxygen.  Do not 
give epinephrine or similar drugs.
Note to physicians:  Because of possible increased risk or eliciting
cardiac dysrythmias, catecholamine drugs, such as epinephrine, should be
considered only as a last resort in life threatening emergencies.
Eyes: Flush immediately with water for at least 15 minutes.  Call a physician.
Skin: Flush with water, warm slowly (cool water) if frostbite.  Call a
physician.

PRECAUTIONS/PROCEDURES
Spill or leak:
Using a self-contained air supply and frostbite protection, personnel should
attempt to close valves or repair the source of the leak, if it is safely
possible to do so.  If a large quantity is released, evacuate personnel,
and allow to dissipate.

SHIPPING INFORMATION
Proper shipping name:	Compressed Gas, N.O.S	UN1956
DOT placard:		Nonflammable gas
Do not heat above 125F
Other information:
Date revised: 09/01/97
Person responsible:	George Goble
			Peoples Welding Supply Inc
			426 Brown St. Levee
			W. Lafayette, IN 47906
			(765) 743-3839 or (765) 463-2672