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Hydroquinone: a developmental toxicity study in rats.

W J Krasavage1, A M Blacker, J C English

  • 1Eastman Kodak Company, Rochester, New York 14652-3615.

Fundamental and Applied Toxicology : Official Journal of the Society of Toxicology
|April 1, 1992
PubMed
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Hydroquinone (HQ) exposure in pregnant rats did not cause malformations or significant developmental toxicity. Some maternal weight reduction occurred at high doses, with minor fetal weight decrease, but no major adverse effects were observed.

Area of Science:

  • Toxicology
  • Developmental Biology
  • Reproductive Toxicology

Background:

  • Hydroquinone (HQ) is a chemical used in various industrial applications.
  • Assessing the developmental toxicity of chemical exposures is crucial for understanding potential risks to pregnancy.

Purpose of the Study:

  • To evaluate the potential developmental toxicity of hydroquinone (HQ) in pregnant rats.
  • To determine if HQ exposure affects maternal health, reproductive outcomes, or fetal development.

Main Methods:

  • Pregnant rats were administered varying doses of HQ (0, 30, 100, or 300 mg/kg) daily during gestation.
  • Maternal weight gain, feed consumption, and reproductive parameters were monitored.
  • Fetuses underwent external, soft tissue, and skeletal examinations for malformations and variations.

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Main Results:

  • Maternal rats receiving 300 mg/kg HQ showed slight reductions in body weight gain and feed consumption.
  • No significant effects of HQ on reproductive indices (e.g., pregnancy rate, implantation, resorptions) were observed.
  • No HQ-related malformations were found in fetuses; minor variations were comparable to controls, and skeletal variations were not dose-dependent.

Conclusions:

  • Hydroquinone (HQ) does not appear to cause significant developmental toxicity or malformations in rats at the tested doses.
  • Maternal effects were limited to slight weight reduction at the highest dose.
  • The study suggests a low risk of developmental toxicity from HQ exposure during gestation.