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Toxicity- ChEn 311
Dr Wilding ChEn 311 Exam II
Threshold Limit Value- For a normal 8-hour workday, to which nearly all workers can be exposed day after day without adverse effects
Time Weighted Average. (C1
Immediately Dangerous to Life or Health
No Observed Adverse Effect Level
Short Term Exposure Limit- max concentration to which workers can be exposed for 15 min without suffering
Threshold Limit Value- Ceiling Limit. Should not be exceeded, even instantaneously
Permissible Exposure Level
Vapor Cloud Explosion
Boiling Liquid Expanding Vapor Explosion
Spontaneously combust in the presence of air
Extremely Rapid and Violent Decomposition, produces a shock wave. (class A explosives- 5 PSI is lethal)
Very rapid, often violent decomposition. Rapid burning (class B explosives, no shockwave if unconfined)
Lowest Temperature needed to vaporize enough fuel to form a flammable mixture in air.
Fuel, Oxidizer, Ignition Source
Pressure above Atmospheric Pressure
Any liquid or solid with oxygen in its structure (fuel and oxidizer)
Maximum Allowable Working Pressure
Mean Time Between Failures