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EC number: 202-049-5
CAS number: 91-20-3
single four-hour exposure of 77.7 ppm of naphthalene produced no
signs observed for both sexes during the exposure period included signs
of ocular and respiratory irritation. There
were no clinical signs observed following the exposure or during the
14-day post-exposure period. Body
weight gains were observed for all animals except for one female on
post-exposure day seven considered to be non-treatment related. No
exposure-related gross pathologic lesions were observed at necropsy. The
results of this study indicate that the LC50 for naphthalene
vapour in Wistar albino rats is greater than 77.7 ppm, (0.4 mg/L)
77.7 ppm concentration was the highest naphthalene vapour concentration
obtainable under the conditions of the study.
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