[an error occurred while processing this directive]
Skip to Main Content

Latest News

Advertise Here
September 05, 2011
Volume 89, Number 36
p. 15

Dioxins: More delays for EPA assessment of the chemical’s most hazardous form

Cheryl Hogue

  • Print this article
  • Email the editor

Latest News

October 28, 2011

Speedy Homemade-Explosive Detector

Forensic Chemistry: A new method could increase the number of explosives detected by airport screeners.

Solar Panel Makers Cry Foul

Trade: U.S. companies complain of market dumping by China.

Novartis To Cut 2,000 Jobs

Layoffs follow similar moves by Amgen, AstraZeneca.

Nations Break Impasse On Waste

Environment: Ban to halt export of hazardous waste to developing world.

New Leader For Lawrence Livermore

Penrose (Parney) Albright will direct DOE national lab.

Hair Reveals Source Of People's Exposure To Mercury

Toxic Exposure: Mercury isotopes in human hair illuminate dietary and industrial sources.

Why The Long Fat?

Cancer Biochemistry: Mass spectrometry follows the metabolism of very long fatty acids in cancer cells.

Text Size A A

The Environmental Protection Agency’s assessment of the hazards from the most potent form of dioxin—a report that has been in the works for two decades—is facing still more delays. Now, EPA says it will split its analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) into two parts—one to be released at the beginning of next year, and the other “as quickly as possible.”

Information from the assessment will guide federal and state regulators in setting cleanup requirements for areas polluted with TCDD, polychlorinated biphenyls (PCBs), or related chlorinated and brominated dioxins and furans.

The agency says it will first finalize the section of the report that addresses adverse health effects other than cancer, including reproductive problems, from TCDD exposure. A second, more controversial, part of the TCDD document will deal with human cancer risk from exposure to the chemical. The agency says the cancer section will be released after the first part of the report is finished.

“How much longer will we have to wait?” asks Lois M. Gibbs, executive director of the Center for Health, Environment & Justice, an activist group. “For over 20 years, EPA’s study on dioxin has been delayed time after time. American families have been exposed to this poisonous chemical for far too long.”

EPA’s announcement followed the release of recommendations about the TCDD assessment from the agency’s Science Advisory Board. The board said EPA should provide greater justification on why agency scientists relied on some studies—and not others—to determine the hazards posed by TCDD. The agency should also explain why it excluded studies on dioxin-like compounds, such as PCBs, the board said.

Meanwhile, EPA continues to rely on its 1984 TCDD assessment.

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2011 American Chemical Society
  • Print this article
  • Email the editor

Services & Tools

ACS Resources

ACS is the leading employment source for recruiting scientific professionals. ACS Careers and C&EN Classifieds provide employers direct access to scientific talent both in print and online. Jobseekers | Employers

» Join ACS

Join more than 161,000 professionals in the chemical sciences world-wide, as a member of the American Chemical Society.
» Join Now!