A Message from Dr. William R. Sawyer
Chief Toxicologist, TCAS, LLC
"For more than 34 years, TCAS has been providing health risk assessments and
toxicological guidance to state and governmental agencies, corporations and
select plaintiffs and defendants. Consider the application of our experience to
This is an informational and instructional website devoted to toxicology. It presents
both original and edited public-domain content compiled as a useful educational resource.
References and footnotes have been included wherever possible and image sources
have been cited where appropriate. Although most pages can be printed or downloaded
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