LD 50
The dose of a pollutant or drug that kills 50% of the members of a tested
population. It is the most common indicator of toxicity.
Figure 10.1 LD 50 dose-response curveTherapeutic Effect
The consequence of a test, the results of which are judged to be desirable and
beneficial whether the result was expected, unexpected, or even an unintended
consequence of the treatment.
Toxic
Relating to or caused by a poison.
Toxic Dose
The amount of a substance that may be expected to produce a toxic effect.
TD 50
The dose at which toxicity occurs in 50% of cases.
HAZARDOUS CHEMICALS IN THE ENVIRONMENT
A hazardous waste is a waste with properties that make it dangerous or
potentially harmful to human health or the environment. Hazardous wastes can
be liquids, solids, contained gases, or sludges. The Environmental Protection