Immediately Dangerous to Life and Health (IDLH) is?

Immediately Dangerous to Life and Health (IDLH) is?

• A. 320 ppm
• B. 150 ppm
• C. 1000 ppm
• D. 300 ppm

Answer: (D)

IDLH means a concentration so dangerous that it could cause death or irreversible health effects, and a person should be able to escape within 30 minutes without requiring escape-impairing PPE. It’s the benchmark used to determine what kind of respiratory protection is needed in emergencies. For ammonia, the recognized IDLH value is 300 ppm. That’s why 300 ppm is the correct choice: at this level, exposure presents a severe, life-threatening risk and requires high-level protection to enable a safe escape. The other numbers don’t match the official IDLH for ammonia.

IDLH means a concentration so dangerous that it could cause death or irreversible health effects, and a person should be able to escape within 30 minutes without requiring escape-impairing PPE. It’s the benchmark used to determine what kind of respiratory protection is needed in emergencies.

For ammonia, the recognized IDLH value is 300 ppm. That’s why 300 ppm is the correct choice: at this level, exposure presents a severe, life-threatening risk and requires high-level protection to enable a safe escape. The other numbers don’t match the official IDLH for ammonia.