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Safety Data Sheet
DuPont™ ISCEON® MO99™ (R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
1 / 17
This SDS adheres to the standards and regulatory requirements of the United States and may not meet the regulatory
requirements in other countries.
SECTION 1. PRODUCT AND COMPANY IDENTIFICATION
Product name : DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Tradename/Synonym : MO99
ISCEON MO99™
R-438A
Product Grade/Type : ASHRAE Refrigerant number designation: R-438A
Product Use : Refrigerant
Restrictions on use : For professional users only.
Manufacturer/Supplier : DuPont
1007 Market Street
Wilmington, DE 19898
United States of America
Product Information : +1-800-441-7515 (outside the U.S. +1-302-774-1000)
Medical Emergency : 1-800-441-3637 (outside the U.S. 1-302-774-1139)
Transport Emergency : CHEMTREC: +1-800-424-9300 (outside the U.S. +1-703-527-3887)
SECTION 2. HAZARDS IDENTIFICATION
Product hazard category
Gases under pressure Liquefied gas
107412
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Label content
Pictogram :
Signal word :
Warning
Hazardous warnings :
Contains gas under pressure; may explode if heated.
Hazardous prevention
measures
:
Protect from sunlight. Store in a well-ventilated place.
Other hazards
Misuse or intentional inhalation abuse may lead to death without warning.
Vapours are heavier than air and can cause suffocation by reducing oxygen available for breathing.
Rapid evaporation of the liquid may cause frostbite.
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Component CAS-No. Concentration
Pentafluoroethane (HFC-125) 354-33-6 45 %
1,1,1,2-Tetrafluoroethane (HFC-134a) 811-97-2 44.2 %
Difluoromethane (HFC-32) 75-10-5 8.5 %
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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n-Butane (HC-600) 106-97-8 1.7 %
2-Methylbutane (HC-601a) 78-78-4 0.6 %
SECTION 4. FIRST AID MEASURES
General advice :
Never give anything by mouth to an unconscious person. When symptoms
persist or in all cases of doubt seek medical advice.
Inhalation :
Remove from exposure, lie down. Move to fresh air. Keep patient warm and at
rest. Artificial respiration and/or oxygen may be necessary. Consult a physician.
Skin contact :
In case of contact, immediately flush skin with plenty of water for at least 15
minutes. Take off all contaminated clothing immediately. Consult a physician.
Wash contaminated clothing before re-use. Treat for frostbite if necessary by
gently warming affected area.
Eye contact :
In case of contact, immediately flush eyes with plenty of water for at least 15
minutes. Consult a physician if necessary.
Ingestion :
Is not considered a potential route of exposure.
Most important
symptoms/effects, acute
and delayed
:
Anaesthetic effects Light-headedness irregular heartbeat with a strange
sensation in the chest, heart thumping, apprehension, feeling of fainting,
dizziness or weakness
Protection of first-aiders :
If potential for exposure exists refer to Section 8 for specific personal protective
equipment.
Notes to physician :
Because of possible disturbances of cardiac rhythm, catecholamine drugs,
such as epinephrine, that may be used in situations of emergency life support
should be used with special caution.
SECTION 5. FIREFIGHTING MEASURES
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Suitable extinguishing media :
Use extinguishing measures that are appropriate to local circumstances and
the surrounding environment.
Unsuitable extinguishing
media
:
No applicable data available.
Specific hazards :
Cylinders are equipped with pressure and temperature relief devices, but may
still rupture under fire conditions. Decomposition may occur. Contact of
welding or soldering torch flame with high concentrations of refrigerant can
result in visible changes in the size and colour of the torch flame. This flame
effect will only occur in concentrations of product well above the
recommended exposure limit. Therefore stop all work and ventilate to
disperse refrigerant vapors from the work area before using any open flames.
This substance is not flammable in air at temperatures up to 100 deg. C (212
deg. F) at atmospheric pressure. However, mixtures of this substance with
high concentrations of air at elevated pressure and/or temperature can
become combustible in the presence of an ignition source. This substance
can also become combustible in an oxygen enriched environment (oxygen
concentrations greater than that in air). Whether a mixture containing this
substance and air, or this substance in an oxygen enriched atmosphere
become combustible depends on the inter-relationship of 1) the temperature
2) the pressure, and 3) the proportion of oxygen in the mixture. In general,
this substance should not be allowed to exist with air above atmospheric
pressure or at high temperatures; or in an oxygen enriched environment. For
example this substance should NOT be mixed with air under pressure for leak
testing or other purposes. Experimental data have also been reported which
indicate combustibility of this substance in the presence of certain
concentrations of chlorine.
Special protective equipment
for firefighters
:
In the event of fire, wear self-contained breathing apparatus. Use personal
protective equipment. Wear neoprene gloves during cleaning up work after a
fire.
Further information :
Cool containers/tanks with water spray. Water runoff should be contained
and neutralized prior to release.
SECTION 6. ACCIDENTAL RELEASE MEASURES
NOTE: Review FIRE FIGHTING MEASURES and HANDLING (PERSONNEL) sections before proceeding with clean-up.
Use appropriate PERSONAL PROTECTIVE EQUIPMENT during clean-up.
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Safeguards (Personnel) :
Evacuate personnel to safe areas. Ventilate area, especially low or enclosed
places where heavy vapours might collect.
Environmental precautions :
Should not be released into the environment.
In accordance with local and national regulations.
Spill Cleanup
:
Evaporates.
Ventilate area using forced ventilation, especially low or enclosed places
where heavy vapors might collect.
Accidental Release Measures :
Avoid open flames and high temperatures. Self-contained breathing
apparatus (SCBA) is required if a large release occurs.
SECTION 7. HANDLING AND STORAGE
Handling (Personnel) :
Avoid breathing vapours or mist. Avoid contact with skin, eyes and clothing.
Provide sufficient air exchange and/or exhaust in work rooms. For personal
protection see section 8.
Handling (Physical Aspects) :
Contact with chlorine or other strong oxidizing agents should also be avoided.
Dust explosion class :
Not applicable
Storage :
Valve protection caps and valve outlet threaded plugs must remain in place
unless container 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
(<3000 psig) piping or systems. Never attempt to lift cylinder by its cap. Use a
check valve or trap in the discharge line to prevent hazardous back flow into
the cylinder. Cylinders should be stored upright and firmly secured to
prevent falling or being knocked over.
Separate full containers from empty containers. Keep at temperature not
exceeding 52°C. Do not store near combustible materials. Avoid area where
salt or other corrosive materials are present.
The product has an indefinite shelf life when stored properly.
Storage period :
> 10 yr
Storage temperature :
< 52 °C (< 126 °F)
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Engineering controls :
Normal ventilation for standard manufacturing procedures is generally
adequate. Local exhaust should be used when large amounts are released.
Mechanical ventilation should be used in low or enclosed places. Refrigerant
Concentration monitors may be necessary to determine vapor concentrations
in work areas prior to use of torches or other open flames, or if employees are
entering enclosed areas.
Personal protective equipment
Respiratory protection :
Under normal manufacturing conditions, no respiratory protection is required
when using this product.
Hand protection :
Additional protection: Impervious gloves
Eye protection :
Wear safety glasses with side shields. Additionally wear a face shield where
the possibility exists for face contact due to splashing, spraying or airborne
contact with this material.
Protective measures :
Self-contained breathing apparatus (SCBA) is required if a large release
occurs.
Exposure Guidelines
Exposure Limit Values
Pentafluoroethane (HFC-125)
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
1,1,1,2-Tetrafluoroethane (HFC-134a)
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
Difluoromethane (HFC-32)
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
Butane (<0.1% butadiene)
TLV (ACGIH) 1,000 ppm STEL
2-Methylbutane
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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TLV (ACGIH) 1,000 ppm TWA
Pentafluoroethane
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
1,1,1,2-Tetrafluoroethane
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
Difluoromethane
AEL * (DUPONT) 1,000 ppm 8 & 12 hr. TWA
Butane (<0.1% butadiene)
TLV (ACGIH) 1,000 ppm STEL
* AEL is DuPont's Acceptable Exposure Limit. Where governmentally imposed occupational exposure limits which are
lower than the AEL are in effect, such limits shall take precedence.
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance
Physical state :
gaseous
Form :
Liquefied gas
Color :
colourless
Odor :
slight, ether-like
Odor threshold :
No applicable data available.
pH :
neutral
Melting point/freezing point
:
Melting point/range
Not available for this mixture.
Boiling point/boiling range :
Boiling point
-42.3 °C (-44.1 °F)
Flash point :
does not flash
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Evaporation rate :
No applicable data available.
Flammability (solid, gas) :
Not applicable
Upper explosion limit :
Method: None per ASTM E681
Lower explosion limit :
Method: None per ASTM E681
Vapor pressure :
11,171 hPa at 25 °C (77 °F)
Vapor density :
3.5 at 25°C (77°F) and 1013 hPa (Air=1.0)
Specific gravity (Relative
density)
:
1.15 at 25 °C (77 °F)
Water solubility :
No applicable data available.
Solubility(ies) :
No applicable data available.
Partition coefficient: n-
octanol/water
:
No applicable data available.
Auto-ignition temperature :
No applicable data available.
Decomposition temperature :
No applicable data available.
Viscosity, kinematic :
No applicable data available.
Viscosity :
No applicable data available.
% Volatile :
100 %
SECTION 10. STABILITY AND REACTIVITY
Reactivity : No applicable data available.
Chemical stability : Stable under recommended storage conditions.
Possibility of hazardous
reactions
: Polymerization will not occur.
Conditions to avoid : The product is not flammable in air under ambient conditions of temperature
and pressure. When pressurised with air or oxygen, the mixture may become
flammable. Certain mixtures of HCFCs or HFCs with chlorine may become
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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flammable or reactive under certain conditions.
Incompatible materials : Alkali metals Alkaline earth metals, Powdered metals, Powdered metal salts
Hazardous decomposition
products
: Decomposition products are hazardous., This material can be decomposed
by high temperatures (open flames, glowing metal surfaces, etc.) forming
hydrofluoric acid and possibly carbonyl fluoride., These materials are toxic
and irritating., Avoid contact with decomposition products
SECTION 11. TOXICOLOGICAL INFORMATION
Pentafluoroethane (HFC-125)
Inhalation 4 h LC50 : > 800000 ppm , Rat
Inhalation No Observed
Adverse Effect
Concentration
: 100000 ppm , Dog
Cardiac sensitization
Inhalation Low Observed
Adverse Effect
Concentration (LOAEC)
: 75000 ppm , Dog
Cardiac sensitization
Skin sensitization :
Does not cause respiratory sensitisation., human
Repeated dose toxicity :
Inhalation
Rat
-
gas
NOAEL: > 50000,
No toxicologically significant effects were found.
Carcinogenicity :
Not classifiable as a human carcinogen.
Overall weight of evidence indicates that the substance is not
carcinogenic.
Mutagenicity :
Animal testing did not show any mutagenic effects.
Evidence suggests this substance does not cause genetic damage in
cultured mammalian cells.
Did not cause genetic damage in cultured bacterial cells.
Reproductive toxicity :
No toxicity to reproduction
Animal testing showed no reproductive toxicity.
Teratogenicity :
Animal testing showed no developmental toxicity.
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Further information :
Cardiac sensitisation threshold limit : 490000 mg/m3
1,1,1,2-Tetrafluoroethane (HFC-134a)
Inhalation 4 h LC50 : > 567000 ppm , Rat
Inhalation No Observed
Adverse Effect
Concentration
: 40000 ppm , Dog
Cardiac sensitization
Inhalation Low Observed
Adverse Effect
Concentration (LOAEC)
: 80000 ppm , Dog
Cardiac sensitization
Skin irritation : No skin irritation, Rabbit
Eye irritation : No eye irritation, Rabbit
Skin sensitization :
Does not cause skin sensitisation., Guinea pig
Does not cause respiratory sensitisation., Rat
Repeated dose toxicity :
Inhalation
Rat
-
gas
NOAEL: 50000,
No toxicologically significant effects were found.
Carcinogenicity :
Not classifiable as a human carcinogen.
Overall weight of evidence indicates that the substance is not
carcinogenic.
Mutagenicity :
Animal testing did not show any mutagenic effects.
Tests on bacterial or mammalian cell cultures did not show mutagenic
effects.
Reproductive toxicity :
No toxicity to reproduction
No effects on or via lactation
Animal testing showed no reproductive toxicity.
Teratogenicity :
Animal testing showed no developmental toxicity.
Further information :
Cardiac sensitisation threshold limit : 334000 mg/m3
Difluoromethane (HFC-32)
Inhalation 4 h LC50 : > 520000 ppm , Rat
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Inhalation Low Observed
Adverse Effect
Concentration (LOAEC)
: > 350000 ppm , Dog
Cardiac sensitization
Inhalation No Observed
Adverse Effect
Concentration
: 350000 ppm , Dog
Cardiac sensitization
Skin irritation : No skin irritation, Not tested on animals
Not expected to cause skin irritation based on expert review of the
properties of the substance.
Eye irritation : No eye irritation, Not tested on animals
Not expected to cause eye irritation based on expert review of the
properties of the substance.
Skin sensitization :
Does not cause skin sensitisation., Not tested on animals
Not expected to cause sensitization based on expert review of the
properties of the substance.
There are no reports of human respiratory sensitization.
Repeated dose toxicity :
Inhalation
Rat
-
No toxicologically significant effects were found.
Mutagenicity :
Animal testing did not show any mutagenic effects.
Tests on bacterial or mammalian cell cultures did not show mutagenic
effects.
Reproductive toxicity :
No toxicity to reproduction
Animal testing showed no reproductive toxicity.
Information given is based on data obtained from similar substances.
Teratogenicity :
Animal testing showed no developmental toxicity.
Further information :
Cardiac sensitisation threshold limit : > 735000 mg/m3
n-Butane (HC-600)
Inhalation 4 h LC50 : 277018 ppm , Rat
Target Organs: Respiratory Tract, Central nervous system
Irritating to respiratory system.
Central nervous system depression
narcosis
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Dermal : Not applicable
Oral : Not applicable
Skin irritation : No skin irritation, Not tested on animals
Not expected to cause skin irritation based on expert review of the
properties of the substance.
Eye irritation : No eye irritation, Not tested on animals
Not expected to cause eye irritation based on expert review of the
properties of the substance.
Skin sensitization :
Not tested on animals
There are no reports of human skin sensitization. Not expected to
cause sensitization based on expert review of the properties of the
substance.
Repeated dose toxicity :
Inhalation
multiple species
-
No toxicologically significant effects were found.
Mutagenicity :
Animal testing did not show any mutagenic effects.
2-Methylbutane (HC-601a)
Inhalation 4 h LC50 : 1,281.9 mg/l , Rat
Target Organs: Central nervous system
Central nervous system depression
narcosis
Inhalation 4 h LC50 : 70000 ppm , Rat
Oral LD50 : > 2,000 mg/kg , Rat
Skin irritation : slight irritation, human
Eye irritation : No eye irritation, Rabbit
Skin sensitization :
Did not cause sensitisation on laboratory animals., Guinea pig
Repeated dose toxicity :
Inhalation
Rat
-
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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No toxicologically significant effects were found.
Mutagenicity :
Tests on bacterial or mammalian cell cultures did not show mutagenic
effects.
Animal testing did not show any mutagenic effects.
Reproductive toxicity :
No toxicity to reproduction
Animal testing showed no reproductive toxicity.
Teratogenicity :
Animal testing showed no developmental toxicity.
Carcinogenicity
The carcinogenicity classifications for this product and/or its ingredients have been determined according
to HazCom 2012, Appendix A.6. The classifications may differ from those listed in the National Toxicology
Program (NTP) Report on Carcinogens (latest edition) or those found to be a potential carcinogen in the
International Agency for Research on Cancer (IARC) Monographs (latest edition).
None of the components present in this material at concentrations equal to or greater than 0.1% are listed
by IARC, NTP, or OSHA, as a carcinogen.
SECTION 12. ECOLOGICAL INFORMATION
Aquatic Toxicity
Pentafluoroethane (HFC-125)
96 h LC50
: Oncorhynchus mykiss (rainbow trout) 450 mg/l
Information given is based on data obtained from similar substances.
96 h ErC50 : Algae 142 mg/l
Information given is based on data obtained from similar substances.
72 h NOEC : Pseudokirchneriella subcapitata (green algae) 13.2 mg/l
Information given is based on data obtained from similar substances.
48 h EC50
: Daphnia magna (Water flea) 980 mg/l
Information given is based on data obtained from similar substances.
1,1,1,2-Tetrafluoroethane (HFC-134a)
96 h LC50
: Oncorhynchus mykiss (rainbow trout) 450 mg/l
96 h ErC50 : Algae 142 mg/l
Information given is based on data obtained from similar substances.
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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72 h NOEC : Pseudokirchneriella subcapitata (green algae) 13.2 mg/l
Information given is based on data obtained from similar substances.
48 h EC50
: Daphnia magna (Water flea) 980 mg/l
Difluoromethane (HFC-32)
96 h LC50
: Fish 1,507 mg/l
96 h EC50 : Algae 142 mg/l
48 h EC50
: Daphnia (water flea) 652 mg/l
30 d : NOEC Fish (unspecified species) 65.8 mg/l
n-Butane (HC-600)
96 h LC50
: Fish (unspecified species) > 1,000 mg/l
2-Methylbutane (HC-601a)
96 h LC50
: Oncorhynchus mykiss (rainbow trout) 4.26 mg/l
72 h ErC50 : Pseudokirchneriella subcapitata (green algae) 25.12 mg/l
72 h ErC50 : Scenedesmus capricornutum (fresh water algae) 10.7 mg/l
72 h EbC50 : Scenedesmus capricornutum (fresh water algae) 7.51 mg/l
48 h EC50
: Daphnia magna (Water flea) 2.3 mg/l
28 d : NOEC Oncorhynchus mykiss (rainbow trout) 7.6 mg/l
21 d : NOEC Daphnia magna (Water flea) 13.29 mg/l
Environmental Fate
Difluoromethane (HFC-32)
Biodegradability : 5 % OECD Test Guideline 301D
Not readily biodegradable.
n-Butane (HC-600)
Biodegradability : 100 %
Readily biodegradable
2-Methylbutane (HC-601a)
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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Biodegradability : 71.43 %
Readily biodegradable
Bioaccumulation : Bioconcentration factor (BCF) : 171
Bioaccumulation is unlikely.
SECTION 13. DISPOSAL CONSIDERATIONS
Waste disposal methods -
Product
:
Can be used after re-conditioning. Recover by distillation or remove to a
permitted waste disposal facility. Comply with applicable Federal,
State/Provincial and Local Regulations.
Contaminated packaging :
Empty pressure vessels should be returned to the supplier.
SECTION 14. TRANSPORT INFORMATION
DOT UN number :
1078
Proper shipping name :
Refrigerant gases, n.o.s. (1,1,1,2-Tetrafluoroethane,
Pentafluoroethane)
Class :
2.2
Labelling No. :
2.2
Reportable Quantity :
10 lbs
IATA_C UN number :
1078
Proper shipping name :
Refrigerant gas, n.o.s. (1,1,1,2-Tetrafluoroethane,
Pentafluoroethane)
Class :
2.2
Labelling No. :
2.2
IMDG UN number :
1078
Proper shipping name :
REFRIGERANT GAS, N.O.S. (1,1,1,2-Tetrafluoroethane,
Pentafluoroethane)
Class :
2.2
Labelling No. :
2.2
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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SECTION 15. REGULATORY INFORMATION
SARA 313 Regulated
Chemical(s)
:
This material does not contain any chemical components with known CAS
numbers that exceed the threshold (De Minimis) reporting levels established
by SARA Title III, Section 313.
PA Right to Know
Regulated Chemical(s)
:
Substances on the Pennsylvania Hazardous Substances List present at a
concentration of 1% or more (0.01% for Special Hazardous Substances):
Butane (<0.1% butadiene), Difluoromethane
NJ Right to Know
Regulated Chemical(s)
:
Substances on the New Jersey Workplace Hazardous Substance List present
at a concentration of 1% or more (0.1% for substances identified as
carcinogens, mutagens or teratogens): Butane (<0.1% butadiene),
Difluoromethane
CERCLA Reportable
Quantity
:
4301 lbs
Based on the percentage composition of this chemical in the product.:
Chloropentafluoroethane
California Prop. 65 :
Chemicals known to the State of California to cause cancer, birth defects or
any other harm: none known
SECTION 16. OTHER INFORMATION
ISCEON is a registered trademark of E. I. du Pont de Nemours and Company
®
DuPont's registered trademark
Before use read DuPont's safety information.
For further information contact the local DuPont office or DuPont's nominated distributors.
Revision Date :
04/01/2015
The information provided in this Safety Data Sheet is correct to the best of our knowledge, information and belief at the
date of its publication. The information given is designed only as a guidance for safe handling, use, processing, storage,
transportation, disposal and release and is not to be considered a warranty or quality specification. The information
relates only to the specific material designated and may not be valid for such material used in combination with any
other materials or in any process, unless specified in the text.
Significant change from previous version is denoted with a double bar.
Safety Data Sheet
DuPont
™
ISCEON
®
MO99
™
(R-438A) Refrigerant
Version 2.0
Revision Date 04/01/2015 Ref. 130000031356
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