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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.

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: