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EC number: 231-143-9
CAS number: 7440-33-7
The mean MMADs of the test atmosphere were
2.63 and 2.74 um with GSDs of 1.89 and 1.92 for the low and high dose groups,
Overall means for TBO concentrations were
determined gravimetrically to be 0.081and 0.652 mg/L for the low and high
dose groups, respectively. The TBO % recovery ranged from
100.83-102.38%. Small amounts of TBO in the chemically-analyzed filters
for the Filtered Air Control group were attributed to contamination
during the filter analysis processing and/or the calibration curve. The
Filtered Air Control group filter-collected mean gravimetric value was
0.000 mg/L. The particle size distribution of the test atmosphere was
within the respirable range. The overall mean TBO inhaled dose levels
were 14.8 and 118.8 mg/kg/day for the lowand high dose groups,
respectively. The overall mean male TBO inhaled dose levels were 13.7
and 110.2 mg/kg/day for the low and high dose groups, respectively. The
overall mean female TBO inhaled dose levels were 15.8 and 127.3
mg/kg/day for the low and high dose groups, respectively. The male
inhaled dose levels were 10-11% below the target levels for all groups,
while the female inhaled dose levels were 3-5% above the target levels
for all groups. Prior to exposure initiation, the homogeneity of the
test atmosphere in each TBO exposure chamber was confirmed.
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