Hexachlorodibenzo-p-dioxin

CAS Number

34465-46-8

Synonym

Dibenzo(b,e)(1,4)dioxin,hexachloro; Hexachlorodibenzo-4-dioxin; Hexachlorodibenzodioxin

Occurrence/Use

Contaminant in pesticides and pentachlorophenol (wood preservative); component of diesel emissions, tobacco smoke, stack emissions from waste oil furnaces, combustion of materials containing PVC or polychlorinated biphenyls; byproduct of chlorine-bleached pulp and paper

Cancer Potency Information

Inhalation Unit Risk (μg/cubic meter)-1:	3.8 E+0
Inhalation Slope Factor (mg/kg-day)-1:	1.3 E+4
Oral Slope Factor (mg/kg-day)-1:	1.3 E+4
Comments/References:	OEHHA 2009. Air Toxics Hot Spots Program Technical Support Document for Cancer Potencies. Appendix B. Chemical-specific summaries of the information used to derive unit risk and cancer potency values. Updated 2011. Listed under Chlorinated Dibenzo-p-Dioxins.

Proposition 65

Chemical Status

Cancer:	Currently listed

Cancer

Cancer - Listing Mechanism

State's Qualified Experts

Listed as causing :	Listed as causing: Cancer
Date of Listing:	04/01/1988

Safe Harbor Levels

No Significant Risk Level (NSRL)

0.0002 µg/day

Cancer