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NON-LETHAL CHEMICAL AGENTS
TOXICITY of CN and CS
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DEFINITION OF TERMS
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•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 (0.000001 m3 or 1.0 gm)•1 oz. = 28.350 gm•66 minutes = time average man uses 1 m3 of air
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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.
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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. (British Government Study)! 4.0 mg/m3 - amount that rioters will usually disperse at. (British Government Study)
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Waco, Texas
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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.
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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.
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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 700CS: IC50 = 20 milligrams per minute / cubic meter of air.
LC50 = 25,000 milligrams per minute / cubic meter of airSAFETY FACTOR OF 1,250
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