Organophosphate (OP)
•OP contains C, H,O and P
•OP is yellow or brown liquid, odor
•Dissolve in organic solvents, alcohol
•Accumulate in adipose tissue
•High toxic when are metabolized by microsomal enzyme
•Example: malathion(LD50= 1000 mg.kg), methyl parathion (LD50= 2 mg.kg)
•Mechanism toxicity: inhibit acetylcholinesterase by irreversible reaction