1. NON-LETHAL CHEMICAL AGENTS
TOXICITY of CN and CS

2. DEFINITION OF TERMS

3. m3 = Cubic meter (Approximately 35 cubic feet)
gm = Gram (0.353 oz.)
mg = Milligram (0.001 grams - to convert grams to milligrams multiply by 1,000)
cc = Cubic centimeter ( m3 or 1.0 gm)
1 oz. = gm
66 minutes = time average man uses 1 m3 of air

4. MEDIAN INCAPACITATION DOSAGE (IC50) -
The amount of inhaled vapor or aerosol which is sufficient
to incapacitate 50% of exposed personnel. Usually expressed in
milligrams per minute in one cubic meter of air.

6. INCAPACITATION CONCENTRATION TIME (ICT50) -
Concentration (IC50) multiplied by the time (t) of exposure that
incapacitates 50% of exposed personnel. Usually expressed in
minutes of exposure.
! .004 mg/m3 - smallest amount a human can detect.
(British Government Study)
! 0.5 mg/m3 - amount that riot bystanders usually retreat at.
! 4.0 mg/m3 - amount that rioters will usually disperse at.

7. Waco, Texas

8. MEDIAN LETHAL DOSAGE (LC50) - The amount of inhaled
vapor or aerosol which is sufficient to kill 50% of exposed personnel.
Usually expressed in milligrams per minute in one cubic meter of air.

9. LETHAL CONCENTRATION TIME (LCT50) - Concentration
(LC50) multiplied by the time (t) of exposure that is lethal to 50%
of exposed personnel. Usually expressed in minutes of exposure.

12. SAFETY FACTOR - Ratio between the lethal and incapacitating
dose of an agent (LCT50/ICT50).
CN: IC50 = 20 milligrams per minute / cubic meter of air.
LC50 = 14,000 milligrams per minute / cubic meter of air
SAFETY FACTOR OF 700
CS: IC50 = 20 milligrams per minute / cubic meter of air.
LC50 = 25,000 milligrams per minute / cubic meter of air
SAFETY FACTOR OF 1,250

18. LCT50 Calculators