Threshold Toxicity Values
EXPOSURE VIA INHALATION ppm mg m-3 SIGNS AND SYMPTOMS REFERENCES
0.05 – 3.5 0.3 - 23 Odour threshold a
> 1.0 > 6.5 Irritation level a
40 – 60 260 - 390
Toxic pneumonitis and pulmonary oedema
a
1000 6500 Fatal within a few minutes a