9
|
Maximum allowable concentration for short term exposure in living area. No symptoms.
|
35
|
Maximum allowable concentration exposure in any 8-hour period. No symptoms.
|
100
|
No poisoning symptoms for long periods of time. Allowable for several hours.
|
200
|
Slight headache, tiredness, dizziness, and nausea after 2-3 hours. Maximum concentration for short-term exposure (15 minutes).
|
400
|
Frontal headache within 1-2 hours. Life-threatening after 3 hours.
|
800
|
Dizziness, nausea, and convulsions within 45 minutes. Unconsciousness within 2 hours. Death within 2-3 hours.
|
1,600
|
Headache, dizziness, and nausea within 20 minutes. Death within one hour.
|