TWA/PEL at Chemical Glossary

What is it? Time Weighted Average or Permissible exposure limit. This is the cumulative average concentration over an 8 hr/day, 40 hr/wk to which a worker can be safely exposed. (OSHA Federal Standard)

Chemistry Definition Added By: Ben

Send To Friends!

If you'd like to send the TWA/PEL definition to yourself or to your friends/colleagues, just enter the e-mail addresses in the boxes below -

We hope you now understand the meaning of TWA/PEL. If you need any more information on this term, please don't hesitate to contact us.

Other Similar Chemical Terms:

Chemistry Term Additives is In the manufacturing process of plastics, polymer is just one constituent. Their are other chemicals like impact modifiers, colorants, reinforcements, plasticisers and stabilizers etc that give specific properties to the plastics. These are called additiv

Chemistry Term Liquefied Natural Gas (LNG) is Gas, mainly methane, liquefied under pressure and low temperature.

Chemistry Term thermistor is a semiconductor whose resistance will vary with temperature.

Chemistry Term Stoddard Solvent (see petroleum distillates) is Petroleum distillate. Eye and mucous-membrane irritant. Neurotoxic. Found in all-purpose cleaners, abrasives, and floor and auto waxes.

Chemistry Term Lethal Dose50 is The dose of a substance or chemical that will (LD50) kill 50 percent of the test animals in a group within the first 30 days following exposure.