Best answer: How much benzene does it take to cause cancer?

EPA estimates that 10 ppb benzene in drinking water that is consumed regularly or exposure to 0.4 ppb in air over a lifetime could cause a risk of one additional cancer case for every 100,000 exposed persons.

What is a dangerous level of benzene?

Basis for revised IDLH: The revised IDLH for benzene is 500 ppm based on acute inhalation toxicity data in humans [Gerarde 1960]. [Note: NIOSH recommends as part of its carcinogen policy that the “most protective” respirators be worn for benzene at concentrations above 0.1 ppm.

Can you get cancer from benzene?

The Department of Health and Human Services (DHHS) has determined that benzene causes cancer in humans. Long-term exposure to high levels of benzene in the air can cause leukemia, cancer of the blood-forming organs.

How much benzene is too much?

OSHA limits exposure to benzene in the air in most workplaces to 1 ppm (part per million) during an average workday and a maximum of 5 ppm over any 15-minute period. When working at potentially higher exposure levels, OSHA requires employers to provide personal protective equipment such as respirators.

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How many ppm of benzene is dangerous?

NIOSH: The recommended airborne exposure limit (REL) is 0.1 ppm averaged over a 10-hour workshift and 1 ppm, not to be exceeded during any 15-minute work period. ACGIH: The threshold limit value (TLV) is 0.5 ppm averaged over an 8-hour workshift and 2.5 ppm as a STEL (short-term exposure limit).

What is the immediately dangerous to life or health limit for benzene?

Inhalation of 20,000 ppm is rapidly fatal. For occupational exposure, the TLV-TWA (threshold limit value time weighted average) is 0.5 ppm and the TLV-STEL (short term exposure limit) is 2.5 ppm; 500 ppm is IDLH (immediately dangerous to life and health).

What is the maximum amount of benzene that can be carried as a limited quantity?

Airborne: The maximum time-weighted average (TWA) exposure limit is 1 part of benzene vapor per million parts of air (1 ppm) for an 8-hour workday and the maximum short-term exposure limit (STEL) is 5 ppm for any 15-minute period.

How long does benzene stay in your body?

Some of the harmful effects of benzene exposure are caused by these metabolites. Most of the metabolites of benzene leave the body in the urine within 48 hours after exposure.

What is benzene commonly found in?

Benzene is a widely used industrial chemical. Benzene is found in crude oil and is a major part of gasoline. It’s used to make plastics, resins, synthetic fibers, rubber lubricants, dyes, detergents, drugs and pesticides. Benzene is produced naturally by volcanoes and forest fires.

When did benzene cause cancer?

Benzene-induced cancer in humans was first reported in the late 1920s. Carcinogenesis findings in animals were not reported conclusively until 1979.

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Is benzene lethal?

Inhalation of benzene vapor concentrations of 20,000 ppm for 5-10 minutes can be fatal to humans; death results from central nervous system depression (Clayton and Clayton, 1981).

What is an acute effect of benzene on the human body?

Acute (short-term) inhalation exposure of humans to benzene may cause drowsiness, dizziness, headaches, as well as eye, skin, and respiratory tract irritation, and, at high levels, unconsciousness.

Is benzene in Coca Cola?

Benzene can form in soft drinks containing vitamin C and either sodium benzoate or potassium benzoate. … Scientists say factors such as heat or light exposure can trigger a reaction that forms benzene in the beverages.

Is 500 ppm dangerous?

In addition, the following observations have been made: some workers will tolerate concentrations ranging up to 200 ppm for 6 to 8 hours daily with no demonstrable ill effects; 200 to 500 ppm for 6 to 8 hours will cause tiredness and lassitude in most workers; and concentrations over 500 ppm for 1 to 3 hours are …

What is the action level for benzene?

Definitions. Action level means an airborne concentration of benzene of 0.5 ppm calculated as an 8-hour time-weighted average. Assistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. Department of Labor, or designee.

What is the smell of benzene?

Benzene has a sweet, aromatic, gasoline-like odor. Most individuals can begin to smell benzene in air at 1.5 to 4.7 ppm. The odor threshold generally provides adequate warning for acutely hazardous exposure concentrations but is inadequate for more chronic exposures.

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