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CH3041
CHLOROPHENOXY
HERBICIDES
• Paraquat has caused 100’s of human deaths (murder or suicide) as it destroys lungs & there is no antidote.
(ii) Phenoxy : 2,4-D
• selective herbicide for
 broadleaf weed species used in lawns, fields
• military defoliant with 2,4,5-T  HPLC
• non-persistent (t½ < 2 weeks in water)
• Works by emulating the hormone auxin and
causing the plant to grow out of control.
A systemic herbicide. LD50 (Rat) 370 mg kg-1