 At 2000 ppm, cumulative body weight gains were observed and some histopathological changes in the spleens were noted; however, these effects were not statistically significant.Based on these histopathological parameters in the spleen, the no observed adverse effect level(NOAEL) was estimated to be 8.3 mg/kg/day while the lowest observed adverse effect level(LOAEL) was 818.5 mg/kg/day.A 28-day rat dermal toxicity study was conducted to evaluate dermal exposure, the route most directly applicable to the indoor use on ornamentals grown in containers.