Influence of formaldehyde and sonacide® (potentiated acid glutaraldehyde) on embryo and fetal development in mice

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Abstract
Pregnant outbred albino mice were given formaldehyde or Sonacide® (potentiated acid glutaraldehyde) by gavage on days 6–15 of gestation. The mice were killed on day 18, the general health and reproductive status of the dam evaluated, and the fetuses examined and processed in order to characterize external, visceral, and skeletal malformations. Although formaldehyde (stock solution containing 12–15% methanol as a preservative) was lethal to 22 of 34 dams treated with 185 mg/kg/day, and one of 35 dams treated with 148 mg/kg/day, these doses did not produce statistically significant (two-sided p < 0.05 versus controls) teratogenic effects in the fetuses of the surviving dams. Sonacide® was also judged not to be teratogenic to the mice employed in this study, in spite of the fact that relatively high doses were employed. The highest doses of Sonacide® studied (5.0 ml/kg/day, which is equivalent to 100 mg/kg/day of glutaraldehyde) killed 19 of 35 dams and caused a significant reduction in the mean weight gain of the surviving mothers. In addition, this dose produced a significant increase in the number of stunted fetuses.

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