Evaluation of the teratogenic potential of the plasticizer butyl benzyl phthalate in rats

✍ Scribed by Makoto Ema; Toshimi Murai; Takafumi Itami; Hironoshin Kawasaki

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 485 KB
• Volume: 10
• Category: Article
• ISSN: 0260-437X
• DOI: 10.1002/jat.2550100506

✦ Synopsis

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-' for the 0.25% group, 375 mg kg-' for the 0.5% group, 654 mg kg-' for the 1.0% group and 974 mg kg-' 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.