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Table 1 Potency values (by agency)

From: An approach to estimating the environmental burden of cancer from known and probable carcinogens: application to Ontario, Canada

Carcinogen Oral Slope Factor (per mg/kg-day) Inhalation Unit Risk (per μg/m3)
Health Canada US EPA CalEPA Health Canada US EPA CalEPA
1,2-Dichloropropane    3.6E-02    1.0E-05
1,3-Butadiene    6.0E-01   3.0E-05 1.7E-04
2,3,7,8-Tetrachlorodibenzo-para-dioxin (TCDD)    1.3E+ 05    3.8E+ 01
Acrylamide   5.0E-01 4.5E+ 00   1.0E-04 1.3E-03
Alpha-Chlorinated toluenes   1.7E-01 1.7E-01    4.9E-05
Arsenic 1.8E+ 00 1.5E+ 00 9.5E+ 00 6.4E-03 4.3E-03 3.3E-03
Asbestosa      2.3E-01 1.9E+ 00
Benzeneb 8.3E-02 5.5E-02 1.0E-01 3.3E-06 7.8E-06 2.9E-05
Cadmiumc     9.8E-03 1.8E-03 4.2E-03
Chromium (VI)    5.0E-01 7.6E-02 1.2E-02 1.5E-01
Dichloromethane (methylene chloride) 7.9E-05 2.0E-03 1.4E-02 2.3E-08 1.0E-08 1.0E-06
Diesel particulate matter       3.0E-04
Formaldehyde      1.3E-05 6.0E-06
Nickel       2.6E-04
Polycyclic Aromatic Hydrocarbons (PAHs) 2.3E+ 00 7.3E+ 00 2.9E+ 00 3.1E-05   1.1E-03
Polychlorinated biphenyls (PCBs)   2.0E+ 00 2.0E+ 00   1.0E-04 5.7E-04
Tetrachloroethylene (PCE)   2.1E-03 5.4E-01   2.6E-07 5.9E-06
Trichloroethylene (TCE) 8.1E-04 4.6E-02 5.9E-03 6.1E-07 4.1E-06 2.0E-06
Vinyl chloride (chloroethene)d 2.6E-01 1.5E+ 00 2.7E-01   8.8E-06 7.8E-05
  1. aThe units for the asbestos IUR are per fibres/mL
  2. bWhere one agency presented a range for the slope factor, the high range from that agency was used
  3. cWhile CalEPA presented an OSF for cadmium we did not employ it
  4. dThe “from birth” value was selected from US EPA IRIS