Table 4.
Chemical dependent factors for oral, dermal and inhalation exposure routes. All factors in this table came from CEHT [31], which provide references to primary sources.
| Factor | Oral | Dermal | Inhalation | ||
|---|---|---|---|---|---|
| Relative Bioavailability Factor, RBA (Fraction) | Oral Slope Factor (kg·day/mg) | Absorption Factor, ABS (Unitless) | Dermal Slope Factor (kg·day/mg) | Inhalation Slope Factor (kg·day/mg) | |
| Arsenic | 0.33 | 1.5 | 0.001 | 1.579 | 15.05 |
| Barium | 1.0 | NA a | 0.001 | NA | NA |
| Vanadium | 1.0 | NA | 0.001 | NA | NA |
| Benzo[a]pyrene | 0.5 | 7.3 | 0.01 | 14.6 | 3.1 |
| Benz[a]anthracene | 0.5 | 0.73 | 0.01 | 1.46 | 0.31 |
| Benzo[b]fluoranthene | 0.5 | 0.73 | 0.01 | 1.46 | 0.31 |
| Dibenz[a,h]anthracene | 0.5 | 7.3 | 0.01 | 14.6 | 3.1 |
a NA = Not Applicable.