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Say 'Aaah'

Beware These Substances

November 09, 1998

Ever wonder what are the top 20 substances considered most hazardous by the U.S. Agency for Toxic Substances and Disease Registry? For a description of and other information about the hazards posed by the substances, click on the agency's Web site:

http://atsdr1.atsdr.cdc.gov:8080/cxcx3.html. The list:

1. Arsenic

2. Lead

3. Mercury, metallic

4. Vinyl chloride

5. Benzene

6. Polychlorinated biphenyls (PCBs)

7. Cadmium

8. Benzo(a)pyrene

9. Benzo(b)fluoranthene

10. Polycyclic aromatic hydrocarbons

11. Chloroform

12. Aroclor 1254

13. DDT

14. Aroclor 1260

15. Trichloroethylene

16. Chromium (+6)

17. Dibenz[a,h]an thracene

18. Dieldrin

19. Hexachlorobutadiene

20. Chlordane

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