P. Beyrouty et al., TOXICOLOGY OF DIETHYLENE GLYCOL BUTYL ETHER .5. DERMAL SUBCHRONIC NEUROTOXICITY STUDY IN RATS, Journal of the American College of Toxicology, 12(2), 1993, pp. 169-174
Groups of Sprague-Dawley rats were treated dermally with the vehicle,
distilled water or with diethylene glycol butyl ether (DGBE) at 10 or
30% v/v aq. solutions or undiluted (0.2, 0.6, or 2.0 g/kg body weight)
for 13 weeks under occlusion 6 hr/day, 5 days/week, at the maximum at
tainable volume of 2 mL/kg. Male and female rats were examined using a
functional observational battery (FOB) prestudy, at 1, 6, and 24 hr a
fter the initiation of the first exposure, and prior to treatment on d
ays 7, 14, 35, 63, and 91. Motor activity was determined prestudy and
on nontreated days 34, 62, and 90. At the completion of treatment, six
control and top dose group animals were perfused for neuropathology.
There was no mortality, and the body weights and food consumption were
unaffected. Five females in the top dose group had scab formation at
the treatment site during the study. There were no other treatment-rel
ated clinical findings. The FOB and motor activity tests revealed no f
indings indicative of a neurotoxic effect, and there were no gross or
neuropathological changes that were attributed to treatment. No neurot
oxicity or other systemic toxicity was seen at the highest dose tested
-2 g/kg/day.