CAS Number: 100-41-4. A liquid hydrocarbon that is usually made
from benzene and ethylene and is used primarily in the
manufacture of styrene. Chemical formula = C8H10. Molecular
weight = 106.16 g/mol.
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Ethylbenzene is mainly used in the manufacture of styrene. Acute
(short-term) exposure to ethylbenzene in humans results in
respiratory effects, such as throat irritation and chest
constriction, irritation of the eyes, and neurological effects
such as dizziness. Chronic (long-term) exposure to ethylbenzene
by inhalation in humans has shown conflicting results regarding
its effects on the blood. Animal studies have reported effects
on the blood, liver, and kidneys from chronic inhalation exposure
to ethylbenzene. Limited information is available on the
carcinogenic effects of ethylbenzene in humans. In a study by
the National Toxicology Program (NTP), exposure to ethylbenzene
by inhalation resulted in an increased incidence of kidney and
testicular tumors in rats, and lung and liver tumors in mice.
EPA has classified ethylbenzene as a Group D, not classifiable as
to human carcinogenicity.