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