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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)
Published on: May 10, 2016
Tertiary-Butanol: a toxicological review.
1Toxicity Evaluation Consultants, Aberdour, Scotland, United Kingdom. mcgregortec@btinternet.com
Critical Reviews in Toxicology
|August 21, 2010
Summary
Tert-butanol, a chemical intermediate, has low acute toxicity but can irritate skin and eyes. While not genotoxic, it targets male rat kidneys and rat/mouse bladders, with potential thyroid tumors in mice, though these may not apply to humans.
Area of Science:
- Toxicology
- Environmental Health
- Industrial Chemistry
Background:
- Tert-butanol is a key intermediate in synthesizing fuel oxygenates.
- Human exposure can occur through metabolism or biodegradation of fuel oxygenates.
- Absorption is rapid via inhalation/ingestion, with dose-dependent elimination.
Purpose of the Study:
- To evaluate the systemic toxicity, metabolism, and carcinogenicity of tert-butanol.
- To identify target organs and potential human health risks associated with tert-butanol exposure.
- To investigate the mechanisms underlying observed tumor incidences.
Main Methods:
- Systemic toxicity assessment through various exposure routes.
- Metabolism studies identifying key urinary metabolites like 2-hydroxyisobutyrate.
- Long-term rodent bioassays to evaluate carcinogenicity and target organ toxicity.
Main Results:
- Low single-dose systemic toxicity; irritant to skin and eyes.
- Identified target organs: male rat kidney and male rat/mouse urinary bladder.
- Observed renal tubule adenomas in male rats (linked to non-human modes of action) and thyroid follicular cell adenomas in female mice (potentially strain-specific).
Conclusions:
- Tert-butanol exhibits low systemic toxicity but poses risks to specific organs.
- Observed tumor incidences in rodents are associated with mechanisms not relevant to humans.
- Further investigation into thyroid effects suggests a possible mode of action requiring more study.
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