Record Display for the EPA National Library Catalog


Main Title Postnatal Developmental Alterations Following Prenatal Exposure to the Herbicide 2,4-Dichlorophenyl-p-nitrophenyl Ether: A Dose Response Evaluation in the Mouse.
Author Gray, Jr., L. E. ; Kavlock, R. J. ; Chernoff, N. ; Ostby, J. ; Ferrell, J. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/J-82-177;
Stock Number PB84-187368
Additional Subjects Toxicology ; Herbicides ; Rats ; Mice ; Lethal dosage ; Laboratory animals ; Exposure ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB84-187368 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
Although nitrogen, 2,4-dichlorophenyl-p-nitrophenyl ether, is a relatively nontoxic herbicide, prenatal exposure to doses considerably less than the LD50 value for rats and mice produces numerous developmental defects that become apparent as the animals mature. In the present study postnatal development was observed following prenatal exposure during Days 7 to 17 of gestation at doses of 0, 6.25, 12.5, 25, 50, 100, 150, and 200 mg/kg/day. These doses did not cause maternal toxicity as indicated by the viability of the dams or maternal weight gain during pregnancy. By 3 days of age all pups in the two highest dose groups were dead and 50% had died in the 100 mg/kg/day dose group. Some of the dead and moribund pups from the 200 mg/kg/day exposure group necropsied at three days of age had cleft palate (15%) or diaphragmatic hernia (6%). In addition, about 22% of the pups at 200 mg/kg/day developed a distended abdomen from gasping and swallowing air.