ToxFAQs™ for Fuel Oils
Spanish: Aceites combustibles
CAS#: 8008-20-6, 70892-10-3, 68476-30-2, 68476-34-6, 68476-31-3
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This fact sheet answers the most frequently
asked health questions about fuel oils. For more information, you may call the ATSDR Information Center at 1-888-422-8737. This fact sheet is one in a series of summaries about hazardous substances and their health effects. It is important you understand this information because this substance may harm you. The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present.
Fuel oils are liquid mixtures produced from petroleum, and their use mostly involves burning them as fuels. Drinking or breathing fuel oils may cause nausea or nervous system effects. However, exposure under normal use conditions is not likely to be harmful. Fuel oils have been found in at least 26 of the 1,430 National Priorities List sites identified by the Environmental Protection Agency (EPA).
What are fuel oils?
Fuel oils are a variety of yellowish
to light brown liquid mixtures that come from crude petroleum.
Some chemicals found in fuel oils may evaporate easily, while
others may more easily dissolve in water.
Fuel oils are produced by different petroleum
refining processes, depending on their intended uses. Fuel
oils may be used as fuel for engines, lamps, heaters, furnaces,
and stoves, or as solvents.
Some commonly found fuel oils include
kerosene, diesel fuel, jet fuel, range oil, and home heating
oil. These fuel oils differ from one another by their hydrocarbon
compositions, boiling point ranges, chemical additives, and
What happens to fuel oils when they enter the environment?
- Some chemicals found in fuel oils may evaporate into
the air from open containers or contaminated soil or water.
- Some chemicals found in fuel oils may dissolve in water
after spills to surface waters or leaks from underground
- Some chemicals found in fuel oils may stick to particles
in water, which will eventually cause them to settle to
the bottom sediment.
- Some of the chemicals found in fuel oils may be broken
down slowly in air, water, and soil by sunlight or small
- Some of the chemicals found in fuel oils may build up
significantly in plants and animals.
How might I be exposed to fuel oils?
- Using a home kerosene heater or stove, or using fuel oils
- Breathing air in home or building basements that has been
contaminated with fuel oil vapors entering from the soil.
- Drinking or swimming in water that has been contaminated
with fuel oils from a spill or a leaking underground storage
- Touching soil contaminated with fuel oils.
- Using fuel oils to wash paint or grease from skin or equipment.
How can fuel oils affect my health?
Little information is available about
the health effects that may be caused by fuel oils. People
who use kerosene stoves for cooking do not seem to have any
health problems related to their exposure.
Breathing some fuel oils for short periods
may cause nausea, eye irritation, increased blood pressure,
headache, light-headedness, loss of appetite, poor coordination,
and difficulty concentrating. Breathing diesel fuel vapors
for long periods may cause kidney damage and lower your blood's
ability to clot.
Drinking small amounts of kerosene may
cause vomiting, diarrhea, coughing, stomach swelling and cramps,
drowsiness, restlessness, painful breathing, irritability,
and unconsciousness. Drinking large amounts of kerosene may
cause convulsions, coma, or death. Skin contact with kerosene
for short periods may cause itchy, red, sore, or peeling skin.
How likely are fuel oils to cause cancer?
The International Agency for Research
on Cancer (IARC) has determined that some fuel oils (heavy)
may possibly cause cancer in humans, but for other fuel oils
(light) there is not enough information to make a determination.
IARC has also determined that occupational exposures to fuel
oils during petroleum refining are probably carcinogenic in
Some studies with mice have suggested
that repeated contact with fuel oils may cause liver or skin
cancer. However, other mouse studies have found this not to
be the case. No studies are available in other animals or
in people on the carcinogenic effects of fuel oils.
Is there a medical test to show whether I've been exposed to fuel oils?
There is no medical test that shows if
you have been exposed to fuel oils. Tests are available to
determine if some of the chemicals commonly found in fuel
oils are in your blood. However, the presence of these chemicals
in blood may not necessarily mean that you have been exposed
to fuel oils.
Has the federal government made recommendations to protect human health?
The Occupational Safety and Health Administration
(OSHA) and the Air Force Office of Safety and Health (AFOSH)
have set a permissible exposure level (PEL) of 400 parts of
petroleum distillates per million parts of air (400 ppm) for
an 8-hour workday, 40-hour workweek.
The National Institute for Occupational
Safety and Health (NIOSH) recommends that average workplace
air levels not exceed 350 milligrams of petroleum distillates
per cubic meter of air (350 mg/m3) for a 40-hour workweek.
The Department of Transportation (DOT)
lists fuel oils as hazardous materials and, therefore, regulates
Carcinogenic: Able to cause cancer.
CAS: Chemical Abstracts Service.
Evaporate: To change into a vapor or
Hydrocarbon: Any compound made up of
hydrogen and carbon.
Milligram (mg): One thousandth of a gram.
ppm: Parts per million.
Sediment: Mud and debris that have settled
to the bottom of a body of water.
Agency for Toxic Substances and Disease
Registry (ATSDR). 1995. Toxicological Profile for fuel oils. Atlanta, GA: U.S. Department of
Health and Human Services, Public Health Service.
Where can I get more information?
If you have questions or concerns, please contact your community or state health or environmental quality department or:
For more information, contact:
Agency for Toxic Substances and Disease Registry
Office of Innovation and Analytics, Toxicology Section
4770 Buford Highway
Chamblee, GA 30341-3717
Phone: 1-800-CDC-INFO 888-232-6348 (TTY)
Email: Contact CDC-INFO
ATSDR can also tell you the location of occupational and environmental health clinics. These clinics specialize in recognizing, evaluating, and treating illnesses resulting from exposure to hazardous substances.