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Related Experiment Videos

Inhalation developmental toxicity and reproduction studies with cyclohexane.

K H Kreckmann1, J K Baldwin, L G Roberts

  • 1The DuPont Company, Haskell Laboratory for Toxicology and Industrial Medicine, Newark, DE 19714, USA.

Drug and Chemical Toxicology
|November 9, 2000
PubMed
Summary
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Cyclohexane exposure in rats and rabbits showed no developmental toxicity. However, high concentrations (7000 ppm) caused parental effects in rats, establishing a reproductive no-observed-effect level (NOEL) of 2000 ppm.

Area of Science:

  • Toxicology
  • Reproductive Toxicology
  • Developmental Toxicology

Background:

  • Cyclohexane is a widely used industrial solvent.
  • Understanding its potential health effects is crucial for occupational safety.
  • Previous studies have indicated potential risks, necessitating comprehensive assessment.

Purpose of the Study:

  • To evaluate the reproductive and developmental toxicity of cyclohexane.
  • To determine the no-observed-effect levels (NOELs) for systemic, reproductive, and developmental toxicity.
  • To assess the effects across different exposure durations and species.

Main Methods:

  • Two-generation reproduction study in rats (Crl:CD BR).
  • Developmental toxicity studies in rats (Crl:CD BR) and rabbits (Hra:(NZW)SPF).

Related Experiment Videos

  • Whole-body exposure to atmospheric concentrations of 0, 500, 2000, or 7000 ppm cyclohexane.

    • Main Results:

    • Parental effects in rats at 7000 ppm included reduced body weight and food efficiency.
    • Reduced pup weight observed in rat offspring exposed to 7000 ppm cyclohexane.
    • Transient neurological effects (diminished response to sound) in rats at 2000 ppm and above.
    • No compound-related maternal or developmental toxicity in rabbits up to 7000 ppm.
    • Systemic toxicity NOEL for rats: 500 ppm.
    • Reproductive NOEL for rats: 2000 ppm.
    • Maternal NOEL for rats: 500 ppm.
    • Maternal NOEL for rabbits: 7000 ppm.
    • Developmental NOEL for both species: 7000 ppm.

    Conclusions:

    • Cyclohexane does not exhibit developmental toxicity in rats or rabbits at tested concentrations.
    • Reproductive toxicity in rats is observed at 7000 ppm, with a NOEL of 2000 ppm.
    • Maternal toxicity in rats is observed at 2000 ppm and above, with a NOEL of 500 ppm.
    • Rabbits show no adverse effects at the highest concentration tested (7000 ppm).