Inhalation 10Â mg/m3* | ||
---|---|---|
 | Amosite | |
 | LAF | SAF |
11% >10 μm | 0.1% > 10 μm | |
Number of rats | 40 | 42 |
Lung tumor | 11 (27.5%) | 0 (0%) |
Mesothelioma | 3 (7.5%) | 1 (2.4%) |
 | Chrysotile | |
 | LAF | SAF |
2% >10 μm | 0.7% > 10 μm | |
0.1% >30 μm | 0.03% >30 μm | |
Number of rats | 40 | 40 |
Lung tumor | 20 (50%) | 7 (17.5%) |
Mesothelioma | 3 (7.5%) | 1 (2.4%) |
Mesotheliomas after intraperitoneal injection** | ||
 | Amosite | |
 | LAF | SAF |
Number of rats | Not provided | Not provided |
10Â mg | 21 (88%) | 0 (0%) |
25Â mg | 20 (90%) | 1 (4%) |
 | Chrysotile | |
Number of rats | 24 | 24 |
2.5Â mg | 22 (91.6%) | 8 (33.3%) |
25Â mg | 23 (95.8%) | 22 (91.6%) |