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2,3,3',4,4',5,5'-HpCB

CAS Number

39635-31-9

Synonym

PCB Congener, PCB 189; 2,3,3',4,4',5,5'-Heptachlorobiphenyl

Occurrence/Use

From items containing PCB; present in some incinerator emissions. US manufacture banned in 1979

2,3,3',4,4',5,5'-HpCB

Cancer Potency Information

Inhalation Unit Risk (μg/cubic meter)-1: 
1.1 E-3
Inhalation Slope Factor (mg/kg-day)-1: 
3.9 E+0
Oral Slope Factor (mg/kg-day)-1: 
3.9 E+0
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.