physical and chemical properties: pure product is white odourless solid crystal with no odour,m.p.150~152oc,d420 1.18.it's almost insoluble in water,soluble in many organic solvents,harkly soluble in ether,xylene and kerosene.unstable in alkaline medium.light can accelerate its decomposition. toxicity: acute oral ld50 of technical to rats is 8~14mg/kg,acute oral ld50 to dogs is 19 mg/kg,acute dermal ld50 to rabbits is 10200 mg/kg.no irritation to skin and eyes.notoxicity to bees,though it has toxicity to birds,lc50 to pheaxant is 573 ppm.