Toxicity- ChEn 311

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Dr Wilding ChEn 311 Exam II

TLV

Threshold Limit Value- For a normal 8-hour workday, to which nearly all workers can be exposed day after day without adverse effects

TWA

Time Weighted Average. (C1t1+C2t2+Cn*tn)/(8 hrs)

IDLH

Immediately Dangerous to Life or Health

NOAEL

No Observed Adverse Effect Level

STEL

Short Term Exposure Limit- max concentration to which workers can be exposed for 15 min without suffering

TLV-C

Threshold Limit Value- Ceiling Limit. Should not be exceeded, even instantaneously

PEL

Permissible Exposure Level

VCE

Vapor Cloud Explosion

BLEVE

Boiling Liquid Expanding Vapor Explosion

Pyrophoric

Spontaneously combust in the presence of air

Detonation

Extremely Rapid and Violent Decomposition, produces a shock wave. (class A explosives- 5 PSI is lethal)

Deflagration

Very rapid, often violent decomposition. Rapid burning (class B explosives, no shockwave if unconfined)

Flash Point

Lowest Temperature needed to vaporize enough fuel to form a flammable mixture in air.

Fire Needs

Fuel, Oxidizer, Ignition Source

Overpressure

Pressure above Atmospheric Pressure

Organic Peroxide

Any liquid or solid with oxygen in its structure (fuel and oxidizer)

Picric Acid

TrinitroPhenol (pyrophoric)

Napthalene

eye goggles

Icosane

C20H42

Dithyl Ether

"bat"

MAWP

Maximum Allowable Working Pressure

MTBF

Mean Time Between Failures

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