Table 1 Cancer incidence, lung burden and Unit risk values for TiO2 nanoparticles, carbon black nanoparticles and diesel engine exhaust in chronic inhalation studies in rats [5]
|  | Control (filtered air) | 10 mg/m3 TiO2 (P25) | 11.6 mg/m3 Carbon black (Printex90) | 2.5 mg/m3 Diesel engine exhaust |
|---|---|---|---|---|
Total cancer incidence (benign and malignant) | 1/217 | 32/100 | 39/100 | 11/200 |
Lung burden (mg/animal at mo 24) | – | 39.3 | 43.9 | 23.7 |
Lung burden as deposited surface area at mo 24 (m2) | – | 1.89 | 9.96 | 2.54 |
Unit risk per μg/m3 | – | 2.1 × 10−5 | 2.22 × 10− 5 | 1.34 × 10− 5 |