... Chlorpyrifos is moderate toxic to animals. Acute oral LD50 for rats 163mg/kg, acute dermal LD50 for rats>2g/kg; ... 15mg/l (96 h, 72°C). Toxic to bees. Acute oral LD50 of 40.7% chlorpyrifos EC for rats 590mg ... /kg, acute dermal for rabbits LD50 2330mg/kg, irritation to skin and ... G for rats LD50>2g/kg, acute dermal for rats LD50>2g/kg, acute inhale LD50>0.007µg/L(7 ...