Chlorinated dibenzo-p dioxins and dibenzofurans

Hot Spots Unit Risk and Cancer Potency values

Unspeciated mixtures treated as 2,3,7,8-tetrachlorodibenzo-p-dioxin (1746-01-6)

CAS Number

1746-01-6

Synonym

Dioxin, TCDD

Occurrence/Use

Byproduct of manufacture of chlorophenols, hexachlorophene, and herbicides; contaminant of the Agent Orange, PCBs, and pentachlorophenol; component of combustion, including waste incineration and tobacco smoke.

More information about 2,3,7,8-Tetrachlorodibenzo-p-dioxin and related compounds
TCDD

Acute RELs

Last Acute REL Revision: 12/01/2008

Chronic REL

Chronic Inhalation REL (μg/m3): 0.00004 (inhalation); 0.00001 μg/kg BW-day (oral)
Chronic Target Organs: Inhalation and oral: Alimentary system (liver); reproductive system; development; endocrine system; respiratory system; hematologic system
Human Data: No
Last Chronic REL Revision: 12/01/2008
Chronic Reference Exposure Levels Comments:

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3