title: Evaluation of the teratogenic potential of the plasticizer butyl benzyl phthalate in rats.
abstract: The teratogenicity of butyl benzyl phthalate (BBP) was studied in Wistar rats. Pregnant rats were given BBP at a dosage of 0, 0.25, 0.5, 1.0 or 2.0% in the diet from day 0 to day 20 of pregnancy. Daily intakes of BBP were 185 mg kg-1 for the 0.25% group, 375 mg kg-1 for the 0.5% group, 654 mg kg-1 for the 1.0% group and 974 mg kg-1 for the 2.0% group. Adjusted maternal body weight gain (body weight gain excluding the gravid uterus) during pregnancy in the 1.0 and 2.0% groups was significantly lowered. Food consumption during pregnancy in the 0.25 and 0.5% groups did not differ from that in the control group. No death was noted in the pregnant females of any group. There was no significant compound-related effects on the incidence of preimplantation loss. All dams given 2.0% BBP exhibited complete resorption of all the implanted embryos. Morphological examinations of the fetuses revealed no evidence of teratogenesis. It could be concluded that the no-observable-effect-levels (NOEL) in rats were 0.5 and 1.0% BBP in the diet for maternal and embryofetal toxicity, respectively.
authors: National Institute of Hygienic Sciences, Osaka, Japan.
authors: M
authors: M
authors: Ema
authors: T
authors: T
authors: Murai
authors: T
authors: T
authors: Itami
authors: H
authors: H
authors: Kawasaki
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004032:Diet; D005260:Female; D005333:Fetus / Q000473:pathology; D006128:Growth / Q000187:drug effects; D009929:Organ Size / Q000187:drug effects; D010795:Phthalic Acids / Q000633:toxicity*; D010968:Plasticizers / Q000633:toxicity*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D012098:Reproduction / Q000187:drug effects; D012744:Sex Ratio; D013723:Teratogens
chemical_list: D010795:Phthalic Acids; D010968:Plasticizers; D013723:Teratogens; C027561:butylbenzyl phthalate