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EC number: 231-143-9
CAS number: 7440-33-7
Overall means for TBO concentrations were
determined gravimetrically to be 0.081, 0.331 and 0.652 mg/L for Groups
2 through 4, 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,
60.2 and 118.8 mg/kg/day for Groups 2 through 4, respectively. The
overall mean male TBO inhaled dose levels were 13.7, 55.7 and 110.2
mg/kg/day for Groups 2 through 4, respectively. The overall mean female
TBO inhaled dose levels were 15.8, 64.7 and 127.3 mg/kg/day for Groups 2
through 4, 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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