1. CHEMICAL PRODUCT and COMPANY INFORMATION
HOVENSA LLC
1 Estate Hope
Christiansted, VI 00820
EMERGENCY TELEPHONE NUMBER (24 hrs): CHEMTREC (800) 424-9300
COMPANY CONTACT (business hours): 340-692-3000
SYNONYMS: Butanes, Commercial Butane, Liquefied Butane, iso-butane, mixed butanes, normal
butane, n-butane.
See Section 16 for abbreviations and acronyms.
2. COMPOSITION and INFORMATION ON INGREDIENTS
INGREDIENT NAME (CAS No.) CONCENTRATION PERCENT BY WEIGHT
Normal butane (n-butane) (106-97-8) 0 - 100
Iso-butane (75-28-5) 0 - 100
Butylene (butene) (25167-67-3) < balance >
Butane consists of two isomers, n-butane (CH3CH2CH2CH3) and iso-butane [(CH3)3CH]. Both isomers
may be isolated separately, or can be available as a mixture. Both isomers exhibits similar hazards and
are grouped as “butane.” Butylene (C4H8) may be present, depending on the source.
3. HAZARDS IDENTIFICATION
EYES
Vapors are not irritating. However, contact with liquid or cold vapor may cause frostbite, freeze burns,
and permanent eye damage
SKIN
Vapors are not irritating. Direct contact to skin or mucous membranes with liquefied product or cold
vapor may cause freeze burns and frostbite. Contact to mucous membranes with liquefied product may
cause frostbite and freeze burns. Signs of frostbite include a change in the color of the skin to gray or
white, possibly followed by blistering. Skin may become inflamed and painful.
INGESTION
Ingestion is unlikely. Contact with mucous membranes with liquefied product may cause frostbite and
freeze burns.
INHALATION
This product is considered to be non-toxic by inhalation. Inhalation of concentrations of about 10,000
ppm may cause central nervous system depression such as dizziness, drowsiness, headache, and
similar narcotic symptoms, but no long-term effects.
EMERGENCY OVERVIEW
DANGER!
EXTREMELY FLAMMABLE GAS - MAY CAUSE FLASH FIRE OR
EXPLOSION! -
COMPRESSED GAS - CONTACT WITH LIQUID CAN CAUSE FROSTBITE OR
FREEZE BURN
High concentrations may exclude oxygen and cause dizziness and suffocation.
Contact with liquid or cold vapor may cause frostbite or freeze burn.
NFPA 704 (Section 16)
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 2 of 6
This product is a simple asphyxiant. In high concentrations it will displace oxygen from the breathing
atmosphere, particularly in confined spaces. Signs of asphyxiation will be noticed when oxygen is
reduced to below 16%, and may occur in several stages. Symptoms may include rapid breathing and
pulse rate, headache, dizziness, visual disturbances, mental confusion, incoordination, mood changes,
muscular weakness, tremors, cyanosis, narcosis and numbness of the extremities. Unconsciousness
leading to central nervous system injury and possibly death will occur when the atmospheric oxygen
concentration is reduced to about 6% to 8% or less.
WARNING: The burning of any hydrocarbon as a fuel in an area without adequate ventilation may result
in hazardous levels of combustion products, including carbon monoxide, and inadequate oxygen levels,
which may cause unconsciousness, suffocation, and death.
CHRONIC and CARCINOGENICITY
None expected - see Section 11.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE
Individuals with pre-existing conditions of the heart, lungs, and blood may have increased susceptibility to
symptoms of asphxia. Butane may hypersensitize the heart to ventricular fibrillation and arrhythmias in
people taking epinephrine.
4. FIRST AID MEASURES
EYES
In case of contact with eyes, hold eyelids open to allow liquid to evaporate. Cover eyes to protect from
light. Seek immediate medical attention.
SKIN
Remove contaminated clothing. In case of frostbite or freeze burns seek immediate medical attention.
INGESTION
Risk of ingestion is extremely low. However, if oral exposure occurs, seek immediate medical assistance.
INHALATION
Remove person to fresh air. If person is not breathing, provide artificial respiration. If necessary, provide
additional oxygen once breathing is restored if trained to do so. Seek medical attention immediately.
5. FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES: Iso-butane n-butane
FLASH POINT: -112.3 oF (-80 oC) -76 oF (-69 oC)
AUTOIGNITION POINT: 550 oF (287 oC) 550 oF (287 oC)
OSHA/NFPA FLAMMABILITY CLASS: FLAMMABLE GAS FLAMMABLE GAS
LOWER EXPLOSIVE LIMIT (%): 1.6 1.6
UPPER EXPLOSIVE LIMIT (%): 8.4 8.4
FIRE AND EXPLOSION HAZARDS
Liquid releases flammable vapors at well below ambient temperatures and readily forms a flammable
mixture with air. Dangerous fire and explosion hazard when exposed to heat, sparks or flame. Vapors
are heavier than air and may travel long distances to a point of ignition and flash back. Container may
explode in heat or fire. Runoff to sewer may cause fire or explosion hazard.
EXTINGUISHING MEDIA
Dry chemical, carbon dioxide, Halon or water. However, fire should not be extinguished unless flow of
gas can be immediately stopped.
FIRE FIGHTING INSTRUCTIONS
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 3 of 6
Gas fires should not be extinguished unless flow of gas can be immediately stopped. Shut off gas source
and allow gas to burn out. If spill or leak has not ignited, determine if water spray may assist in
dispersing gas or vapor to protect personnel attempting to stop leak.
Use water to cool equipment, surfaces and containers exposed to fire and excessive heat. For large fire
the use of unmanned hose holders or monitor nozzles may be advantageous to further minimize
personnel exposure.
Isolate area, particularly around ends of storage vessels. Let vessel, tank car or container burn unless
leak can be stopped. Withdraw immediately in the event of a rising sound from a venting safety device.
Large fires typically require specially trained personnel and equipment to isolate and extinguish the fire.
Firefighting activities that may result in potential exposure to high heat, smoke or toxic by-products of
combustion should require NIOSH/MSHA- approved pressure-demand self-contained breathing
apparatus with full facepiece and full protective clothing.
See Section 16 for NFPA 704 Hazard Rating.
6. ACCIDENTAL RELEASE MEASURES
ACTIVATE FACILITY'S SPILL CONTINGENCY or EMERGENCY RESPONSE PLAN.
Evacuate nonessential personnel and secure all ignition sources. No road flares, smoking or flames in
hazard area. Consider wind direction, stay upwind and uphill, if possible. Evaluate the direction of
product travel. Vapor cloud may be white, but color will dissipate as cloud disperses - fire and explosion
hazard is still present!
Stop the source of the release, if safe to do so. Do not flush down sewer or drainage systems. Do not
touch spilled liquid (frostbite/freeze burn hazard!). Consider the use of water spray to disperse vapors.
Isolate the area until gas has dispersed. Ventilate and gas test area before entering.
7. HANDLING and STORAGE
HANDLING PRECAUTIONS
Keep away from flame, sparks and excessive temperatures. Bond and ground containers. Use only in
well ventilated areas. See also applicable OSHA regulations for the handling and storage of this product,
including, but not limited to, 29 CFR 1910.110 Storage and Handling of Liquefied Petroleum Gases.
STORAGE PRECAUTIONS
Keep away from flame, sparks and excessive temperatures. Store only in approved containers.
WORK/HYGIENIC PRACTICES
Emergency eye wash capability should be available in the near proximity to operations presenting a
potential splash exposure. Use good personal hygiene practices. Avoid repeated and/or prolonged skin
exposure. Wash hands before eating, drinking, smoking, or using toilet facilities. Do not use as a
cleaning solvent or harsh abrasive skin cleaners for washing this product from exposed skin areas.
Waterless hand cleaners are effective. Promptly remove contaminated clothing and launder before reuse.
Use care when laundering to prevent the formation of flammable vapors which could ignite via washer or
dryer. Consider the need to discard contaminated leather shoes and gloves.
8. EXPOSURE CONTROLS and PERSONAL PROTECTION
EXPOSURE LIMITS
Exposure Limits
Components (CAS No.) Source TWA/STEL Note
Normal butane (n-butane)
(106-97-8)
OSHA
ACGIH
None established
1000 ppm as Aliphatic Hydrocarbon Gases
Iso-butane (75-28-5) OSHA None established
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 4 of 6
Exposure Limits
Components (CAS No.) Source TWA/STEL Note
ACGIH 1000 ppm as Aliphatic Hydrocarbon Gases
Butylene (butene) (25167-67-3) OSHA
ACGIH
None established – simple asphyxiant
None established – simple asphyxiant
ENGINEERING CONTROLS
Use adequate ventilation to keep gas and vapor concentrations of this product below occupational
exposure and flammability limits, particularly in confined spaces. Use explosion-proof equipment and
lighting in classified/controlled areas.
EYE/FACE PROTECTION
Safety glasses or goggles are recommended where there is a possibility of splashing or spraying.
SKIN PROTECTION
Where contact with liquid may occur, wear apron, faceshield, and cold-impervious, insulating gloves.
RESPIRATORY PROTECTION
Use a NIOSH/MSHA approved positive-pressure, supplied air respirator with escape bottle or selfcontained
breathing apparatus (SCBA) for gas concentrations above occupational exposure limits, for
potential for uncontrolled release, if exposure levels are not known, or in an oxygen-deficient atmosphere.
Refer to OSHA 29 CFR 1910.134, ANSI Z88.2-1992, NIOSH Respirator Decision Logic, and the
manufacturer for additional guidance on respiratory protection selection.
CAUTION: Flammability limits (i.e., explosion hazard) should be considered when assessing the need to
expose personnel to concentrations requiring respiratory protection.
1. CHEMICAL PRODUCT and COMPANY INFORMATION
HOVENSA LLC
1 Estate Hope
Christiansted, VI 00820
EMERGENCY TELEPHONE NUMBER (24 hrs): CHEMTREC (800) 424-9300
COMPANY CONTACT (business hours): 340-692-3000
SYNONYMS: Butanes, Commercial Butane, Liquefied Butane, iso-butane, mixed butanes, normal
butane, n-butane.
See Section 16 for abbreviations and acronyms.
2. COMPOSITION and INFORMATION ON INGREDIENTS
INGREDIENT NAME (CAS No.) CONCENTRATION PERCENT BY WEIGHT
Normal butane (n-butane) (106-97-8) 0 - 100
Iso-butane (75-28-5) 0 - 100
Butylene (butene) (25167-67-3) < balance >
Butane consists of two isomers, n-butane (CH3CH2CH2CH3) and iso-butane [(CH3)3CH]. Both isomers
may be isolated separately, or can be available as a mixture. Both isomers exhibits similar hazards and
are grouped as “butane.” Butylene (C4H8) may be present, depending on the source.
3. HAZARDS IDENTIFICATION
EYES
Vapors are not irritating. However, contact with liquid or cold vapor may cause frostbite, freeze burns,
and permanent eye damage
SKIN
Vapors are not irritating. Direct contact to skin or mucous membranes with liquefied product or cold
vapor may cause freeze burns and frostbite. Contact to mucous membranes with liquefied product may
cause frostbite and freeze burns. Signs of frostbite include a change in the color of the skin to gray or
white, possibly followed by blistering. Skin may become inflamed and painful.
INGESTION
Ingestion is unlikely. Contact with mucous membranes with liquefied product may cause frostbite and
freeze burns.
INHALATION
This product is considered to be non-toxic by inhalation. Inhalation of concentrations of about 10,000
ppm may cause central nervous system depression such as dizziness, drowsiness, headache, and
similar narcotic symptoms, but no long-term effects.
EMERGENCY OVERVIEW
DANGER!
EXTREMELY FLAMMABLE GAS - MAY CAUSE FLASH FIRE OR
EXPLOSION! -
COMPRESSED GAS - CONTACT WITH LIQUID CAN CAUSE FROSTBITE OR
FREEZE BURN
High concentrations may exclude oxygen and cause dizziness and suffocation.
Contact with liquid or cold vapor may cause frostbite or freeze burn.
NFPA 704 (Section 16)
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 2 of 6
This product is a simple asphyxiant. In high concentrations it will displace oxygen from the breathing
atmosphere, particularly in confined spaces. Signs of asphyxiation will be noticed when oxygen is
reduced to below 16%, and may occur in several stages. Symptoms may include rapid breathing and
pulse rate, headache, dizziness, visual disturbances, mental confusion, incoordination, mood changes,
muscular weakness, tremors, cyanosis, narcosis and numbness of the extremities. Unconsciousness
leading to central nervous system injury and possibly death will occur when the atmospheric oxygen
concentration is reduced to about 6% to 8% or less.
WARNING: The burning of any hydrocarbon as a fuel in an area without adequate ventilation may result
in hazardous levels of combustion products, including carbon monoxide, and inadequate oxygen levels,
which may cause unconsciousness, suffocation, and death.
CHRONIC and CARCINOGENICITY
None expected - see Section 11.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE
Individuals with pre-existing conditions of the heart, lungs, and blood may have increased susceptibility to
symptoms of asphxia. Butane may hypersensitize the heart to ventricular fibrillation and arrhythmias in
people taking epinephrine.
4. FIRST AID MEASURES
EYES
In case of contact with eyes, hold eyelids open to allow liquid to evaporate. Cover eyes to protect from
light. Seek immediate medical attention.
SKIN
Remove contaminated clothing. In case of frostbite or freeze burns seek immediate medical attention.
INGESTION
Risk of ingestion is extremely low. However, if oral exposure occurs, seek immediate medical assistance.
INHALATION
Remove person to fresh air. If person is not breathing, provide artificial respiration. If necessary, provide
additional oxygen once breathing is restored if trained to do so. Seek medical attention immediately.
5. FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES: Iso-butane n-butane
FLASH POINT: -112.3 oF (-80 oC) -76 oF (-69 oC)
AUTOIGNITION POINT: 550 oF (287 oC) 550 oF (287 oC)
OSHA/NFPA FLAMMABILITY CLASS: FLAMMABLE GAS FLAMMABLE GAS
LOWER EXPLOSIVE LIMIT (%): 1.6 1.6
UPPER EXPLOSIVE LIMIT (%): 8.4 8.4
FIRE AND EXPLOSION HAZARDS
Liquid releases flammable vapors at well below ambient temperatures and readily forms a flammable
mixture with air. Dangerous fire and explosion hazard when exposed to heat, sparks or flame. Vapors
are heavier than air and may travel long distances to a point of ignition and flash back. Container may
explode in heat or fire. Runoff to sewer may cause fire or explosion hazard.
EXTINGUISHING MEDIA
Dry chemical, carbon dioxide, Halon or water. However, fire should not be extinguished unless flow of
gas can be immediately stopped.
FIRE FIGHTING INSTRUCTIONS
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 3 of 6
Gas fires should not be extinguished unless flow of gas can be immediately stopped. Shut off gas source
and allow gas to burn out. If spill or leak has not ignited, determine if water spray may assist in
dispersing gas or vapor to protect personnel attempting to stop leak.
Use water to cool equipment, surfaces and containers exposed to fire and excessive heat. For large fire
the use of unmanned hose holders or monitor nozzles may be advantageous to further minimize
personnel exposure.
Isolate area, particularly around ends of storage vessels. Let vessel, tank car or container burn unless
leak can be stopped. Withdraw immediately in the event of a rising sound from a venting safety device.
Large fires typically require specially trained personnel and equipment to isolate and extinguish the fire.
Firefighting activities that may result in potential exposure to high heat, smoke or toxic by-products of
combustion should require NIOSH/MSHA- approved pressure-demand self-contained breathing
apparatus with full facepiece and full protective clothing.
See Section 16 for NFPA 704 Hazard Rating.
6. ACCIDENTAL RELEASE MEASURES
ACTIVATE FACILITY'S SPILL CONTINGENCY or EMERGENCY RESPONSE PLAN.
Evacuate nonessential personnel and secure all ignition sources. No road flares, smoking or flames in
hazard area. Consider wind direction, stay upwind and uphill, if possible. Evaluate the direction of
product travel. Vapor cloud may be white, but color will dissipate as cloud disperses - fire and explosion
hazard is still present!
Stop the source of the release, if safe to do so. Do not flush down sewer or drainage systems. Do not
touch spilled liquid (frostbite/freeze burn hazard!). Consider the use of water spray to disperse vapors.
Isolate the area until gas has dispersed. Ventilate and gas test area before entering.
7. HANDLING and STORAGE
HANDLING PRECAUTIONS
Keep away from flame, sparks and excessive temperatures. Bond and ground containers. Use only in
well ventilated areas. See also applicable OSHA regulations for the handling and storage of this product,
including, but not limited to, 29 CFR 1910.110 Storage and Handling of Liquefied Petroleum Gases.
STORAGE PRECAUTIONS
Keep away from flame, sparks and excessive temperatures. Store only in approved containers.
WORK/HYGIENIC PRACTICES
Emergency eye wash capability should be available in the near proximity to operations presenting a
potential splash exposure. Use good personal hygiene practices. Avoid repeated and/or prolonged skin
exposure. Wash hands before eating, drinking, smoking, or using toilet facilities. Do not use as a
cleaning solvent or harsh abrasive skin cleaners for washing this product from exposed skin areas.
Waterless hand cleaners are effective. Promptly remove contaminated clothing and launder before reuse.
Use care when laundering to prevent the formation of flammable vapors which could ignite via washer or
dryer. Consider the need to discard contaminated leather shoes and gloves.
8. EXPOSURE CONTROLS and PERSONAL PROTECTION
EXPOSURE LIMITS
Exposure Limits
Components (CAS No.) Source TWA/STEL Note
Normal butane (n-butane)
(106-97-8)
OSHA
ACGIH
None established
1000 ppm as Aliphatic Hydrocarbon Gases
Iso-butane (75-28-5) OSHA None established
MATERIAL SAFETY DATA SHEET
Butane MSDS No. 1807
Revision Date: 5/1/2006 Page 4 of 6
Exposure Limits
Components (CAS No.) Source TWA/STEL Note
ACGIH 1000 ppm as Aliphatic Hydrocarbon Gases
Butylene (butene) (25167-67-3) OSHA
ACGIH
None established – simple asphyxiant
None established – simple asphyxiant
ENGINEERING CONTROLS
Use adequate ventilation to keep gas and vapor concentrations of this product below occupational
exposure and flammability limits, particularly in confined spaces. Use explosion-proof equipment and
lighting in classified/controlled areas.
EYE/FACE PROTECTION
Safety glasses or goggles are recommended where there is a possibility of splashing or spraying.
SKIN PROTECTION
Where contact with liquid may occur, wear apron, faceshield, and cold-impervious, insulating gloves.
RESPIRATORY PROTECTION
Use a NIOSH/MSHA approved positive-pressure, supplied air respirator with escape bottle or selfcontained
breathing apparatus (SCBA) for gas concentrations above occupational exposure limits, for
potential for uncontrolled release, if exposure levels are not known, or in an oxygen-deficient atmosphere.
Refer to OSHA 29 CFR 1910.134, ANSI Z88.2-1992, NIOSH Respirator Decision Logic, and the
manufacturer for additional guidance on respiratory protection selection.
CAUTION: Flammability limits (i.e., explosion hazard) should be considered when assessing the need to
expose personnel to concentrations requiring respiratory protection.
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