Toxicity of CS-2 Decontamination Products
摘要
The phytotoxicity and animal toxicity of decontaminated CS-2 and its hydrolysis products were determined in greenhouse and laboratory investigations. The acute oral lethal dose of CS-2 decontamination products for 50 percent of a rat population was established at 1.68 g/kg. For a 96-hour exposure period, the median tolerance limit values for decontaminated Cs-2 were 18.95 ppm for mosquitofish and 16.78 ppm for bluegill. During three generations of Swiss Webster mice receiving 500 ppm decontaminated CS-2 in their drinking water, there were no detectable abnormalities in the offspring. Decontaminated CS-2, as a soil drench, was found to be toxic to plants when it was applied at the rate of 100 ml of a two percent solution per four-inch pot. No damage occurred to plants that received equal quantities of a 0.25 percent solution. The phytotoxicity of decontaminated CS-2 is thought to be caused by its hydrolysis products, o-chlorobenzaldehyde and malononitrile. Plants treated with decontaminated CS-2 and with equivalent amounts of these hydrolysis products all exhibited the same degree of damage.