Material Safety Data Sheet
Isomerate; Mixed Pentanes; DeHexanier Overhead
NFPA: HMIS III:
Flammability
4 1
HEALTH
Reactivity
4
FLAMMABILITY
0
1
Health
0
PHYSICAL
0 = Insignificant, 1 = Slight, 2 = Moderate,
Specific Hazard 3 = High, 4 = Extreme
SECTION 1. PRODUCT AND COMPANY IDENTIFICATION
Product name : Isomerate; Mixed Pentanes; DeHexanier Overhead
Synonyms : 888100004849
MSDS Number Version
: 888100004849 : 1.1
Product Use Description : Fuel
Company : For: Tesoro Refining & Marketing Co.
300 Concord Plaza Drive, San Antonio, TX 78216-6999
Tesoro Call Center Chemtrec
: (877) 783-7676 : (800) 424-9300
(Emergency Contact)
SECTION 2. HAZARDS IDENTIFICATION
Emergency Overview
Regulatory status : This material is considered hazardous by the Occupational Safety and Health
Administration (OSHA) Hazard Communication Standard (29 CFR 1910.1200).
Signal Word : DANGER
Hazard Summary : Flammable. Irritant. Skin contact may cause skin irritation and blisters. Aspiration
hazard if inhaled into the lungs while vomiting.
Potential Health Effects
Eyes : Vapors are not expected to be irritating except in very high (> 100,000 ppm)
concentrations. Splashing of liquid into the eyes may cause pain.
Skin : May cause skin irritation. Blisters may result. Prolonged or repeated contact with
the skin may cause defatting of the skin leading to redness, itching,
inflammation, cracking, dermatitis (rash), and possible secondary infection.
Ingestion : Aspiration hazard if liquid is inhaled into lungs, particularly from vomiting after
ingestion. Aspiration may result in chemical pneumonia, severe lung damage,
respiratory failure and even death. Ingestion may cause gastrointestinal
disturbances, including irritation, nausea, vomiting and diarrhea, and central
nervous (brain) effects similar to alcohol intoxication. In severe cases, tremors,
convulsions, loss of consciousness, coma, respiratory arrest and death may
occur.
Chronic Exposure : Components such as benzene with identified chronic effects are expected to be
present in only trace amounts except in unusual conditions.
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Target Organs : Irritation from skin exposure may aggravate existing open wounds, skin
disorders, and dermatitis (rash)
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Component CAS-No. Weight %
Isopentane; 2-methylbutane 78-78-4 70 - 75%
Pentane 109-66-0 25 - 35%
Butane 106-97-8 4 - 10%
N-hexane 110-54-3 0 - 7%
Cyclohexane 110-82-7 0 - 7%
Benzene 71-43-2 0 - 5%
SECTION 4. FIRST AID MEASURES
Inhalation : Move to fresh air. Give oxygen. If breathing is irregular or stopped, administer
artificial respiration. Seek medical attention immediately.
Skin contact : Take off all contaminated clothing immediately. Wash off immediately with soap
and plenty of water. Wash contaminated clothing before re-use. Seek medical
advice if symptoms persist or develop.
Eye contact : In case of eye contact, immediately flush with low pressure, cool water for at least
15 minutes, opening eyelids to ensure flushing. Seek medical advice.
Ingestion : Do NOT induce vomiting. Do not give liquids. Seek medical attention immediately.
If vomiting does occur naturally, keep head below the hips to reduce the risks of
aspiration. Monitor for breathing difficulties. Small amounts of material which enter
the mouth should be rinsed out until the taste is dissipated.
Notes to physician : Symptoms: Dizziness, Discomfort, Headache, Nausea, Disorder, Vomiting, Lung
edema, Aspiration may cause pulmonary edema and pneumonitis. Liver
disorders, Kidney disorders
SECTION 5. FIRE-FIGHTING MEASURES
Form : Liquid
Flash point : -48.33 ?(-54.99 ?br>
C F)
Auto Ignition temperature : 260 ?(500 ?br>
C F)
Suitable extinguishing media : Carbon dioxide (CO2), Water spray, Dry chemical, Foam, Keep containers and
surroundings cool with water spray. A solid stream of water may scatter and
spread the fire.
Specific hazards during fire : Cool closed containers exposed to fire with water spray.
fighting
Special protective equipment : Firefighting activities that may result in potential exposure to high heat, smoke or
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
for fire-fighters toxic by-products of combustion should require NIOSH/MSHA- approved pressure-
demand self-contained breathing apparatus with full facepiece and full protective
clothing.
Further information : Isolate area around container involved in fire. For massive fires the use of
unmanned hose holders or monitor nozzles may be advantageous to further
minimize personnel exposure. Major fires may require withdrawal, allowing the
tank to burn. Large storage tank fires typically require specially trained personnel
and equipment to extinguish the fire, often including the need for properly applied
fire fighting foam.
SECTION 6. ACCIDENTAL RELEASE MEASURES
Personal precautions : Evacuate nonessential personnel and remove or secure all ignition sources.
Consider wind direction; stay upwind and uphill, if possible. Response and clean-
up crews must be properly trained and must utilize proper protective equipment
(see Section 8).
Environmental precautions : Carefully contain and stop the source of the spill, if safe to do so. Protect bodies of
water by diking, absorbents, or absorbent boom, if possible. Do not flush down
sewer or drainage systems, unless system is designed and permitted to handle
such material. The proper use of water spray may effectively disperse product
vapors or the liquid itself, preventing contact with ignition sources or
areas/equipment that require protection. The use of fire fighting foam may be
useful in certain situations to reduce vapors.
Methods for cleaning up : Take up with sand or oil absorbing materials. Carefully shovel, scoop or sweep up
into a waste container for reclamation or disposal - caution, flammable vapors may
accumulate in closed containers. Response and clean-up crews must be properly
trained and must utilize proper protective equipment (see Section 8).
CERCLA Hazardous substances and corresponding RQs :
Isopentane; 2-methylbutane 78-78-4 100 lbs
Pentane 109-66-0 100 lbs
Butane 106-97-8 100 lbs
N-hexane 110-54-3 5,000 lbs
Cyclohexane 110-82-7 1,000 lbs
Benzene 71-43-2 10 lbs
SECTION 7. HANDLING AND STORAGE
Handling : Keep away from fire, sparks and heated surfaces. No smoking near areas where
material is stored or handled. The product should only be stored and handled in
areas with intrinsically safe electrical classification.
Advice on protection against : Hydrocarbon liquids including this product can act as a non-conductive flammable
fire and explosion liquid (or static accumulators), and may form ignitable vapor-air mixtures in storage
tanks or other containers. Precautions to prevent static-initated fire or explosion
during transfer, storage or handling, include but are not limited to these examples:
(1) Ground and bond containers during product transfers. Grounding and
bonding may not be adequate protection to prevent ignition or explosion of
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
hydrocarbon liquids and vapors that are static accumulators.
(2) Special slow load procedures for "switch loading" must be followed to
avoid the static ignition hazard that can exist when higher flash point
material (such as fuel oil or diesel) is loaded into tanks previously
containing low flash point products (such gasoline or naphtha).
(3) Storage tank level floats must be effectively bonded.
For more information on precautions to prevent static-initated fire or explosion, see
NFPA 77, Recommended Practice on Static Electricity (2007), and API
Recommended Practice 2003, Protection Against Ignitions Arising Out of Static,
Lightning, and Stray Currents (2008).
Dust explosion class : Not applicable
Requirements for storage : Keep away from flame, sparks, excessive temperatures and open flame. Use
areas and containers approved containers. Keep containers closed and clearly labeled. Empty or
partially full product containers or vessels may contain explosive vapors. Do not
pressurize, cut, heat, weld or expose containers to sources of ignition. Store in a
well-ventilated area. The storage area should comply with NFPA 30 "Flammable
and Combustible Liquid Code". The cleaning of tanks previously containing this
product should follow API Recommended Practice (RP) 2013 "Cleaning Mobile
Tanks In Flammable and Combustible Liquid Service" and API RP 2015 "Cleaning
Petroleum Storage Tanks".
Advice on common storage : Keep away from food, drink and animal feed. Incompatible with oxidizing agents.
Incompatible with acids.
Other data : No decomposition if stored and applied as directed.
SECTION 8. EXPOSURE CONTROLS / PERSONAL PROTECTION
Exposure Guidelines
List Components CAS-No. Type: Value
29 CFR 1910.1028 Benzene 71-43-2 TWA 1 ppm
71-43-2 STEL 5 ppm
71-43-2 OSHA_AL 0.5 ppm
OSHA Z1 N-hexane 110-54-3 PEL 500 ppm 1,800 mg/m3
Cyclohexane 110-82-7 PEL 300 ppm 1,050 mg/m3
ACGIH Isopentane; 2-methylbutane 78-78-4 TWA 600 ppm
Pentane 109-66-0 TWA 600 ppm
N-hexane 110-54-3 TWA 50 ppm
Cyclohexane 110-82-7 TWA 100 ppm
Benzene 71-43-2 TWA 0.5 ppm
71-43-2 STEL 2.5 ppm
Protective measures : Keep out of reach of children.
Engineering measures : 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.
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Emergency eye wash capability should be available in the vicinity of any potential
splash exposure.
Eye protection : Safety glasses or goggles are recommended where there is a possibility of
splashing or spraying.
Hand protection : Gloves constructed of nitrile or neoprene are recommended. Consult manufacturer
specifications for further information.
Skin and body protection : Chemical protective clothing such as DuPont TyChem ? Barricade or equivalent,
recommended based on degree of exposure. Flame resistant clothing
recommended for routine conditions where material is handled or stored
Respiratory protection : A NIOSH/ MSHA-approved air-purifying respirator with organic vapor cartridges or
canister may be permissible under certain circumstances where airborne
concentrations are or may be expected to exceed exposure limits or for odor or
irritation. Protection provided by air-purifying respirators is limited. 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. Use a
NIOSH/ MSHA-approved positive-pressure supplied-air respirator if there is a
potential for uncontrolled release, exposure levels are not known, in oxygen-
deficient atmospheres, or any other circumstance where an air-purifying respirator
may not provide adequate protection.
Work / Hygiene 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
on the skin. Do not use solvents 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.
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Form : Liquid
Appearance : Clear
Odor : Gasoline-like odor detectable at 300-500 ppm. Odor detection variable depending
on the olefin (e.g., pentenes) concentration; olefins have a disagreeable odor.
Flash point : -48.33 ?(-54.99 ?br>
C F)
Auto Ignition temperature : 260 ?(500 ?br>
C F)
Thermal decomposition : No decomposition if stored and applied as directed.
pH : Not applicable
Freezing point : Not determined
Boiling point : 21.1 - 93.3 癈(70.0 - 199.9 癋)
Relative Vapor Density : 2.5 (Air = 1.0)
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Percent Volatiles : 100 %
Conductivity Hydrocarbon liquids without static dissipater additive may have conductivity below
(conductivity can be reduced 1 picoSiemens per meter (pS/m). The highest electro-static ignition risks are
by environmental factors such associated with "ultra-low conductivities" below 5 pS/m. See Section 7 for
as a decrease in temperature) sources of information on defining safe loading and handling procedures for low
conductivity products
SECTION 10. STABILITY AND REACTIVITY
Conditions to avoid : Avoid high temperatures, open flames, sparks, welding, smoking and other
ignition sources.
Materials to avoid : Strong oxidizing agents. Peroxides.
Hazardous decomposition : Carbon monoxide, carbon dioxide and noncombusted hydrocarbons (smoke).
products
Thermal decomposition : No decomposition if stored and applied as directed.
Hazardous reactions : Hazardous polymerization does not occur.
SECTION 11. TOXICOLOGICAL INFORMATION
Carcinogenicity
NTP : Benzene (CAS-No.: 71-43-2)
IARC : Benzene (CAS-No.: 71-43-2)
OSHA : Benzene (CAS-No.: 71-43-2)
CA Prop 65 : WARNING! This product contains a chemical known to the State of California to
cause cancer.
Benzene (CAS-No.: 71-43-2)
: WARNING! This product contains a chemical known to the State of California to
cause birth defects or other reproductive harm.
Benzene (CAS-No.: 71-43-2)
Skin irritation : Liquid contact may cause irritation to the skin and mucous membranes. Blisters may
result. Prolonged or repeated contact with the skin may cause defatting of the skin
leading to redness, itching, inflammation, cracking, dermatitis (rash), and possible
secondary infection.
Eye irritation : Irritating to eyes.
Further information : Liver and kidney injuries may occur.
Components of the product may affect the nervous system.
The principal toxicological effect of the pentanes is narcosis at high concentrations.
The possibility that chronic high exposures to pentane may cause polyneuropaphy
(disease of the peripheral nervous system) can not be ruled out; however, it is more
plausible that this effect was caused by other alkanes such as hexane (a
demonstrated neurotoxin) which were also present in the human studies of concern.
Component:
Pentane 109-66-0 Acute oral toxicity: LD50 rat
Dose: 2,001 mg/kg
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Acute inhalation toxicity: LC50 rat
Dose: 364 mg/l
Exposure time: 4 h
Skin irritation: Repeated or prolonged exposure may cause skin irritation and dermatitis,
due to degreasing properties of the product.
Eye irritation: Classification: Irritating to eyes.
Result: Mild eye irritation
N-hexane 110-54-3 Acute oral toxicity: LD50 rat
Dose: 25,000 mg/kg
Acute dermal toxicity: LD50 rabbit
Dose: 2,001 mg/kg
Acute inhalation toxicity: LC50 rat
Dose: 171.6 mg/l
Exposure time: 4 h
Skin irritation: Classification: Irritating to skin.
Result: Skin irritation
Eye irritation: Classification: Irritating to eyes.
Result: Mild eye irritation
Teratogenicity: N11.00418960
Cyclohexane 110-82-7 Acute dermal toxicity: LD50 rabbit
Dose: 2,001 mg/kg
Acute inhalation toxicity: LC50 rat
Dose: 14 mg/l
Exposure time: 4 h
Skin irritation: Classification: Irritating to skin.
Result: Skin irritation
Eye irritation: Classification: Irritating to eyes.
Result: Mild eye irritation
Benzene 71-43-2 Acute oral toxicity: LD50 rat
Dose: 930 mg/kg
Acute inhalation toxicity: LC50 rat
Dose: 44 mg/l
Exposure time: 4 h
Skin irritation: Classification: Irritating to skin.
Result: Mild skin irritation
Repeated or prolonged exposure may cause skin irritation and dermatitis, due to
degreasing properties of the product.
Eye irritation: Classification: Irritating to eyes.
Result: Risk of serious damage to eyes.
SECTION 12. ECOLOGICAL INFORMATION
Additional ecological : Keep out of sewers, drainage areas, and waterways. Report spills and releases, as
information applicable, under Federal and State regulations.
Component:
Isopentane; 2-methylbutane 78-78-4 Toxicity to fish:
LC50
Species: Oncorhynchus mykiss (rainbow trout)
Dose: 3.1 mg/l
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Exposure time: 96 h
Acute and prolonged toxicity for aquatic invertebrates:
EC50
Species: Daphnia magna (Water flea)
Dose: 2.3 mg/l
Exposure time: 96 h
Pentane 109-66-0 Acute and prolonged toxicity for aquatic invertebrates:
EC50
Species: Daphnia magna (Water flea)
Dose: 9.74 mg/l
Exposure time: 48 h
N-hexane 110-54-3 Toxicity to fish:
LC50
Species: Pimephales promelas (fathead minnow)
Dose: 2.5 mg/l
Exposure time: 96 h
Acute and prolonged toxicity for aquatic invertebrates:
EC50
Species: Daphnia magna (Water flea)
Dose: 2.1 mg/l
Exposure time: 48 h
Cyclohexane 110-82-7 Acute and prolonged toxicity for aquatic invertebrates:
EC50
Species: Daphnia magna (Water flea)
Dose: 3.78 mg/l
Exposure time: 48 h
SECTION 13. DISPOSAL CONSIDERATIONS
Disposal : Dispose of container and unused contents in accordance with federal, state and
local requirements.
SECTION 14. TRANSPORT INFORMATION
DOT 49 CFR
Proper shipping name : FLAMMABLE LIQUID, N.O.S.
UN-No. : UN1993
Class : 3
Packing group : 1
Emergency Response : 128
Guidebook Number
Hazard inducer : (Pentane, Isopentane; 2-Methylbutane)
TDGR
Proper shipping name : FLAMMABLE LIQUID, N.O.S.
UN-No. : UN1993
Class : 3
Packing group : 1
Emergency Response : 128
Guidebook Number
Hazard inducer : (Pentane, Isopentane; 2-Methylbutane)
ICAO / IATA-DGR
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
UN-No. : UN1993
Description of the goods : FLAMMABLE LIQUID, N.O.S.
Class : 3
Packing group : 1
ICAO-Labels : 3
Packing instruction (cargo : 303
aircraft)
Packing instruction : 302
(passenger aircraft)
IMDG-Code
UN-No. : UN1993
Description of the goods : FLAMMABLE LIQUID, N.O.S.
Class : 3
Packing group : 1
IMDG-Labels : 3
EmS Number : F-E S-E
Marine pollutant : No
SECTION 15. REGULATORY INFORMATION
OSHA Hazards : Moderate skin irritant
Severe eye irritant
Carcinogen
TSCA Status : On TSCA Inventory
DSL Status : All components of this product are on the Canadian DSL list.
SARA 311/312 Hazards : Acute Health Hazard
Chronic Health Hazard
US. EPA Emergency Planning and Community Right-To-Know Act (EPCRA) SARA Title III Section 313 Toxic
SARA III
Chemicals (40 CFR 372.65) - Supplier Notification Required
Components CAS-No.
N-hexane 110-54-3
Cyclohexane 110-82-7
Benzene 71-43-2
US. Pennsylvania Worker and Community Right-to-Know Law (34 Pa. Code Chap. 301-323)
PENN RTK
Components CAS-No.
Benzene 71-43-2
Cyclohexane 110-82-7
N-hexane 110-54-3
Butane 106-97-8
Pentane 109-66-0
Isopentane; 2-methylbutane 78-78-4
US. Massachusetts Commonwealth's Right-to-Know Law (Appendix A to 105 Code of Massachusetts Regulations
MASS RTK
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
Section 670.000)
Components CAS-No.
Benzene 71-43-2
Cyclohexane 110-82-7
N-hexane 110-54-3
Butane 106-97-8
Isopentane; 2-methylbutane 78-78-4
US. New Jersey Worker and Community Right-to-Know Act (New Jersey Statute Annotated Section 34:5A-5)
NJ RTK
Components CAS-No.
Benzene 71-43-2
Cyclohexane 110-82-7
N-hexane 110-54-3
Butane 106-97-8
Pentane 109-66-0
Isopentane; 2-methylbutane 78-78-4
California Prop. 65 : WARNING! This product contains a chemical known to the State of California to
cause cancer.
Benzene 71-43-2
WARNING! This product contains a chemical known to the State of California to
cause birth defects or other reproductive harm.
Benzene 71-43-2
SECTION 16. OTHER INFORMATION
Further information
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 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.
Prepared by : GWU mbH
Birlenbacher Str. 18
D-57078 Siegen
Germany
Telephone: +49-(0)271-88072-0
Revision Date : 10/20/2008
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MATERIAL SAFETY DATA SHEET Isomerate; Mixed Pentanes; DeHexanizer
Overhead
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