Material Safety Data Sheet
MSDS ID NO.: 0156MAR019
Revision date: 09/12/2005
1. CHEMICAL PRODUCT AND COMPANY INFORMATION
Product name: Marathon Benzene
Synonyms: Benzene; Cyclohexatriene;
Chemical Family: Aromatic Hydrocarbon
Formula: C6H6
Manufacturer:
Marathon Petroleum Company LLC
539 South Main Street
Findlay OH 45840
Other information: 419-421-3070
Emergency telephone number: 877-627-5463
2. COMPOSITION/INFORMATION ON INGREDIENTS
Benzene is an C6 aromatic petroleum hydrocarbon.
Product information
Name CAS Number Weight % ACGIH Exposure OSHA - Vacated Other:
Limits: PELs - Time
Weighted Ave
Marathon Benzene 71-43-2 100 = 0.5 ppm TWA = 10 ppm TWA OSHA Exposure Limit
= 2.5 ppm STEL unless specified in as specified in
skin - potential for 1910.1028 1910.1028:
cutaneous absorption = 25 ppm Ceiling =1.0 ppm TWA
unless specified in = 5 ppm STEL
1910.1028 = 0.5 ppm Action
= 50 ppm STEL 10 Level
min, unless specified
in 1910.1028
Component Information
Name CAS Number Weight % ACGIH Exposure OSHA - Vacated Other:
Limits: PELs - Time
Weighted Ave
Benzene 71-43-2 99-100 = 0.5 ppm TWA = 10 ppm TWA OSHA Exposure Limit
= 2.5 ppm STEL unless specified in as specified in
skin - potential for 1910.1028 1910.1028:
cutaneous absorption = 25 ppm Ceiling =1.0 ppm TWA
unless specified in = 5 ppm STEL
1910.1028 = 0.5 ppm Action
= 50 ppm STEL 10 Level
min, unless specified
in 1910.1028
Notes: The manufacturer has voluntarily elected to reflect exposure limits contained in
OSHA's 1989 air contaminants standard in its MSDS's, even though certain of those
exposure limits were vacated in 1992.
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3. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
BENZENE IS A COLORLESS LIQUID WITH A STRONG HYDROCARBON ODOR. IT IS A VOLATILE AND
EXTREMELY FLAMMABLE LIQUID THAT MAY CAUSE FLASH FIRES. KEEP AWAY FROM HEAT, SPARKS AND
OPEN FLAME.
OSHA WARNING LABEL:
DANGER!
CONTAINS BENZENE.
CANCER HAZARD.
EXTREMELY FLAMMABLE.
CONSUMER WARNING LABEL:
A CONSUMER WARNING LABEL IS NOT APPLICABLE FOR THIS PRODUCT.
Inhalation: Acute exposure to vapor concentrations of 50-150 ppm benzene can cause
respiratory irritation, headache, dizziness and loss of coordination. Concentrations
exceeding 500 ppm may cause central nervous system depression, loss of
consciousness, coma and death resulting from respiratory failure. Excessive
benzene exposure may cause cardiac sensitization.
Ingestion: Liquid ingestion causes severe gastrointestinal pain, abdominal cramps, nausea,
vomiting, narcosis and central nervous system depression. Aspiration (inadvertent
suction) of liquid into the lungs must be avoided as even small quantities in the lungs
can produce chemical pneumonitis, pulmonary edema/hemorrhage and even death.
Skin contact: Prolonged and repeated liquid contact can cause defatting and drying of the skin and
can lead to irritation and/or dermatitis.
Eye contact: Eye irritation may result from contact with the liquid or exposure to the vapor at
concentrations above the TLV.
Carcinogenic Evaluation:
Product information
Name IARC NTP ACGIH - OSHA - Select
Carcinogens: Carcinogens: Carcinogens: Carcinogens:
Marathon Benzene Supplement 7, 1987; Known Carcinogen A1 - Confirmed Human Present
71-43-2 Monograph 29, 1982 Reasonably Anticipated To Carcinogen
Be A Carcinogen
Notes: Benzene is listed by the National Toxicology Program, the International Agency for
Research on Cancer (IARC) and by OSHA as a chemical casually associated with
certain forms of leukemia (cancer) in humans.
Component Information
Name IARC NTP ACGIH - OSHA - Select
Carcinogens: Carcinogens: Carcinogens: Carcinogens:
Benzene Supplement 7, 1987; Known Carcinogen A1 - Confirmed Human Present
71-43-2 Monograph 29, 1982 Reasonably Anticipated To Carcinogen
Be A Carcinogen
4. FIRST AID MEASURES
Inhalation: If affected, move person to fresh air. If breathing is difficult, administer oxygen. If not
breathing or if no heartbeat, give artificial respiration or cardiopulmonary
resuscitation (CPR). Immediately call a physician.
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Skin contact: Wash with soap and large amounts of water. Remove contaminated clothing. If
symptoms or irritation occur, call a physician.
Ingestion: If swallowed, do not induce vomiting and do not give liquids. Immediately call a
physician.
Eye contact: Flush eyes with large amounts of tepid water for at least 15 minutes. If symptoms or
irritation occur, call a physician.
Medical conditions aggravated by Pre-existing skin conditions, respiratory disorders or impaired blood forming organ
exposure: functions may be aggravated by exposure to this product.
5. FIRE FIGHTING MEASURES
Suitable extinguishing media: For small fires, Class B fire extinguishing media such as
CO2, dry chemical, foam (AFFF/ATC) or water spray can be
used. For large fires, water spray, fog or foam (AFFT/ATC)
can be used. Fire fighting should be attempted only by those
who are adequately trained and equipped with proper
protective equipment.
Specific hazards: This product has been determined to be a flammable liquid
per the OSHA Hazard Communication Standard, and should
be handled accordingly. Flashback can occur along vapor
trail. For additional fire related information, see NFPA 30 or
the North American Emergency Response Guide 130.
Special protective equipment for firefighters: Avoid using straight water streams. Water may be
ineffective in extinguishing low flash point fires, but can be
used to cool exposed surfaces. Avoid excessive water spray
application. Water spray and foam (AFFF/ATC) must be
applied carefully to avoid frothing and from as far a distance
as possible. Keep run-off water out of sewers and water
sources.
Flash point: 12 F
Autoignition temperature: 1076 F
Flammable limits in air - lower (%): 1.3
Flammable limits in air - upper (%): 7.9
NFPA rating: HMIS classification:
Health: 2 Health: 2
Flammability: 3 Flammability: 3
Reactivity: 1 Reactivity: 1
Other: - Special: *See Section 8 for guidance in selection of
personal protective equipment.
6. ACCIDENTAL RELEASE MEASURES
Personal precautions: Keep public away. Isolate and evacuate area. Shut off source if safe to do so.
Eliminate all ignition sources. Advise authorities and National Response Center (800-
424-8802) if substance has entered a watercourse or sewer. Notify local health and
pollution control agencies, if appropriate. Contain liquid with sand or soil. Recover
and return free product to proper containers. Use suitable absorbent materials such
as vermiculite, sand, or clay to clean up residual liquids.
7. HANDLING AND STORAGE
Handling:
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Comply with all applicable EPA, OSHA, NFPA and consistent state and local requirements. Use appropriate grounding
and bonding practices. Store in properly closed containers that are appropriately labeled and in a cool well-ventilated
area. Do not expose to heat, open flames, strong oxidizers or other sources of ignition. Do not cut, drill, grind or weld on
empty containers since they may contain explosive residues.
Never siphon this product by mouth. Avoid skin contact. Exercise good personal hygiene including removal of soiled
clothing and prompt washing with soap and water.
Hydrocarbons are basically non-conductors of electricity and can become electrostatically charged during mixing, filtering,
pumping at high flow rates or loading and transfer operations. If this charge reaches a sufficiently high level, sparks can
form that may ignite the vapors of flammable liquids. Sudden release of hot organic chemical vapors or mists from
process equipment operating under elevated temperature and pressure, or sudden ingress of air into vacuum equipment
may result in ignitions without the presence of obvious ignition sources. Nozzle spouts must be kept in contact with the
containers or tank during the entire filling operation.
8. EXPOSURE CONTROLS / PERSONAL PROTECTION
PERSONAL PROTECTIVE EQUIPMENT
Engineering measures: Local or general exhaust required in an enclosed area or when there is inadequate
ventilation.
Respiratory protection: Approved organic vapor chemical cartridge or supplied air respirators should be worn
for exposures to any components exceeding the TLV or STEL. Use an air-supplied
respirator at concentrations above the exposure limit. Self-contained breathing
apparatus should be used for fire fighting.
Skin and body protection: Viton gloves should be used to prevent skin contact.
Eye protection: No special eye protection is normally required. Where splashing is possible, wear
safety glasses with side shields.
Hygiene measures: Use mechanical ventilation equipment that is explosion-proof.
9. PHYSICAL AND CHEMICAL PROPERTIES:
Appearance: Colorless Liquid
Physical state (Solid/Liquid/Gas): Liquid
Substance type (Pure/Mixture): Pure
Color: Colorless
Odor: Aromatic
Molecular weight: 78.1
pH: Neutral
Boiling point/range (5-95%): 176 F
Melting point/range: Not determined.
Decomposition temperature: Not applicable.
Specific gravity: 0.88
Density: 7.32 lbs/gal
Bulk density: No data available.
Vapor density: 2.8
Vapor pressure: 100 mm Hg @ 79 F
Evaporation rate: No data available.
Solubility:
Solubility in other solvents: No data available.
Partition coefficient (n-octanol/water): No data available.
VOC content(%): No data available.
Viscosity: No data available.
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10. STABILITY AND REACTIVITY
Stability: The material is stable at 70 F, 760 mm pressure.
Polymerization: Will not occur.
Hazardous decomposition products: Carbon monoxide, benzene vapor
Materials to avoid: Strong oxidizers such as nitrates, chlorates, peroxides.
Conditions to avoid: Sources of heat or ignition.
11. TOXICOLOGICAL INFORMATION
Acute toxicity:
Product information
Name CAS Number Inhalation: Dermal: Oral:
Marathon Benzene 71-43-2 LC50 = 13,700 ppm LD50 > 8260 mg/kg LD50 = 810 - 10,000 mg/kg
for 4 hrs [Rat] [Rabbit] [Rat]
Repeated or prolonged exposure to benzene at concentrations in excess of the TLV may cause serious injury to blood-
forming organs. Significant chronic exposure to benzene vapor has been reported to produce various blood disorders
ranging from anemia to certain forms of leukemia (cancer) in man. Benzene produced tumors in rats and mice in lifetime
chronic toxicity studies, but the response has not been consistent across species, strain, sex or route of exposure.
Animal studies on benzene have demonstrated immune toxicity, chromosomal aberrations, testicular effects and
alterations in reproductive cycles and embryo/fetotoxicity, but not teratogenicity.
12. ECOLOGICAL INFORMATION
Ecotoxicity effects: The 96 hour LC50 of benzene for stripped bass is 10-100 ppm. The 7 day No
Observed Effect Concentration (NOEC) for benzene in daphnia is 3 mg/l. This
product does not concentrate or accumulate in the food chain.
13. DISPOSAL CONSIDERATIONS
Cleanup Considerations: This product as produced is not specifically listed as an EPA
RCRA hazardous waste according to federal regulations (40
CFR 261). However, when discarded or disposed of, it may
meet the criteria of an "characteristic" hazardous waste. This
product could also contain benzene at >0.5 ppm and could
exhibit the characteristics of "toxicity" as determined by the
toxicity characteristic leaching procedure (TCLP). This
material could become a hazardous waste if mixed or
contaminated with a hazardous waste or other substance(s).
It is the responsibility of the user to determine if disposal
material is hazardous according to federal, state and local
regulations.
14. TRANSPORT INFORMATION
49 CFR 172.101:
DOT:
Transport Information: This material when transported via US commerce would be regulated by DOT
Regulations.
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Proper shipping name: Benzene
UN/Identification No: UN 1114
Hazard Class: 3
Packing group: II
DOT reportable quantity (lbs): 10 pounds.
TDG (Canada):
Proper shipping name: Benzene
UN/Identification No: UN 1114
Hazard Class: 3
Packing group: II
Regulated substances: 10 pounds.
15. REGULATORY INFORMATION
Federal Regulatory Information:
US TSCA Chemical Inventory Section 8(b): This product and/or its components are listed on the TSCA
Chemical Inventory.
OSHA Hazard Communication Standard: This product has been evaluated and determined to be
hazardous as defined in OSHA's Hazard Communication
Standard.
EPA Superfund Amendment & Reauthorization Act (SARA):
SARA Section 302: This product contains the following component(s) that have been listed on EPA's
Extremely Hazardous Substance (EHS) List:
Name CERCLA/SARA - Section 302 Extremely Hazardous Substances and TPQs
Benzene NA
SARA Section 304: This product contains the following component(s) identified either as an EHS or a
CERCLA Hazardous substance which in case of a spill or release may be subject to
SARA reporting requirements:
Name CERCLA/SARA - Hazardous Substances and their Reportable Quantities
Benzene = 0.454 kg final RQ
= 0.454 kg statutory RQ
= 1 lb final RQ
= 1 lb statutory RQ
= 10 lb final RQ
= 10 lb final RQ receives an adjustable RQ of 10 lbs based on potential carcinogenicity in August 14, 1989 final
rule
= 100 lb final RQ
= 4.54 kg final RQ
= 4.54 kg final RQ receives an adjustable RQ of 10 lbs based on potential carcinogenicity in August 14, 1989
final rule
= 45.4 kg final RQ
SARA Section 311/312: The following EPA hazard categories apply to this product:
Acute Health Hazard
Chronic Health Hazard
Fire Hazard
SARA Section 313: This product contains the following component(s) that may be subject to reporting on
the Toxic Release Inventory (TRI) From R:
Name CERCLA/SARA 313 Emission reporting:
Benzene = 0.1 percent de minimis concentration
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State and Community Right-To-Know Regulations:
The following component(s) of this material are identified on the regulatory lists below:
Benzene
Louisiana Right-To-Know: Not Listed
California Proposition 65: carcinogen; initial date 2/27/87
developmental toxicity; initial date 12/26/97
male reproductive toxicity; initial date 12/26/97
New Jersey Right-To-Know: sn 0197
Pennsylvania Right-To-Know: environmental hazard; special hazardous substance
Massachusetts Right-To Know: Carcinogen; Extraordinarily hazardous
Florida substance List: Not Listed.
Rhode Island Right-To-Know: Toxic, Flammable, Carcinogen; skin
Michigan critical materials register list: Annual usage threshold = 100 pounds
Massachusetts Extraordinarily Hazardous carcinogen; extraordinarily hazardous
Substances:
California - Regulated Carcinogens: Not Listed
Pennsylvania RTK - Special Hazardous [present]
Substances:
New Jersey - Special Hazardous Substances: carcinogen; flammable - third degree; mutagen
New Jersey - Environmental Hazardous SN 0197
Substances List:
Illinois - Toxic Air Contaminants Present
New York - Reporting of Releases Part 597 - = 1 lb Land/Water RQ
List of Hazardous Substances: = 10 lbs Air RQ
Canadian Regulatory Information:
Canada DSL/NDSL Inventory: This product and/or its components are listed either on the Domestic Substances List
(DSL) or the Non Domestic Substance List (NDSL).
Name Canada - WHMIS: Classifications of Substances: Canada - WHMIS: Ingredient Disclosure:
Benzene B2; D2A 0.1% (English Item 153, French Item 277)
16. OTHER INFORMATION
Additional Information: No data available.
Prepared by: Craig M. Parker Manager, Toxicology and Product Safety
The information and recommendations contained herein are based upon tests believed to be reliable. However,
Marathon Petroleum Company LLC (MPC) does not guarantee their accuracy or completeness nor shall any of this
information constitute a warranty, whether expressed or implied, as to the safety of the goods, the merchantability of the
goods, or the fitness of the goods for a particular purpose. Adjustment to conform to actual conditions of usage maybe
required. MPC assumes no responsibility for results obtained or for incidental or consequential damages, including lost
profits arising from the use of these data. No warranty against infringement of any patent, copyright or trademark is made
or implied.
End of Safety Data Sheet
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