N-1-naphthylphthalamic acid

N-1-naphthylphthalamic acid

[¦en ¦wən ¦naf·thil·thə′lam·ik ′as·əd] (organic chemistry) C10H7NHCOC6H4COOH A crystalline solid with a melting point of 185°C; used as a preemergence herbicide.