Thresholds: |
TWA | STEL |
mg/m3 | mg/m3 | |
Australia | 1 | |
Belgium | 1 | |
Czechoslovakia | 0.05 | 0.25 |
Denmark | 0.5 | |
Finland | 1 | |
France | 1 | 1 to 4 |
Germany (TRK) | dust 0.5, aerosol 0.05 | |
Great Britain | 1 | |
Russia | 0.05 | |
Hungary | 0.005 | |
Japan | 1 | |
Poland | ||
Sweden | 0.5 | |
Switzerland | 0.5 | |
United States: ACGIH | 1 | |
United States: NIOSH/OSHA | 1 | |
Germany:EKA: | Ni in air | Ni in urine |
µg/m3 | µg/l | |
1003 | 15 | |
3003 | 30 | |
5003 | 45 |