Lethal concentration is taken into the body through inhalation of airborne toxic chemicals. A subscript indicates the portion of the experimental population died from that dose. Lowest published lethal concentration. Health effects for different chemicals vary considerably. The likelihood and degree of damage depend on type and form of substance, the type and rate of exposure and what happens to the substance in the body.
Most hazardous materials affect particular organs of the body.
For example, some damage tissue, such as skin and eyes, on contact, some affect respiration and some affect the nervous system. Often general symptoms, such as headache, and nausea, are confused with symptoms of other diseases. An example is strong acid or caustic contacting tissue and destroying it. Other chemical may not show immediate effects. The delay between exposure and observable effect is a latency period.