R Williams schrieb:
> what are unsafe levels of amonia indoors and when could you tell when
> levels
> are unsafe
>> Richard
As long as you don't feel irritation in the respiratory tract, there is
no real danger. The maximum allowable workplace concentration is 25 ppm
(35 µg/L). A concentration of 300-500 ppm may be tolerated for a short
time. The lethal concentration in air is 5000 ppm and above.
Johannes Westendorf
