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EC number: 200-753-7
CAS number: 71-43-2
The acute inhalation LC50 of
benzene was determined in groups of 10 or 12 female rats to be 13700 ppm
(43767 mg/m3; 43.7mg/L) with a range of 13050-14380 ppm
(41690-45939 mg/m3). Death appeared to be caused by a
depression of the CNS. These animals had increased lung and liver
weights, lung and liver congestion and an increased number of vacuolated
hepatocytes in the liver.
Benzene is of low acute inhalation toxicity
and does not warrant classification under Dir 67/548/EEC.
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