chemical information
CAS RN:

1024-57-3

Chemical Class:

Organochlorine Pesticide (OC)

Found in these people:

Baby #1, Baby #2, Baby #3, Baby #4, Baby #5, Baby #6, Baby #7, Baby #8, Baby #10, Anonymous Adult 1, Kathy Fowler, Sara Corbett

Found in these locations:

Rockville, MD; NY, USA





Heptachlor Epoxide

Organochlorine chemical, a class largely banned in the U.S. that builds up in the body over time, linked to cancer and reproductive harm.

Heptachlor Epoxide has been found in 16 of the 27 people tested in EWG/Commonweal studies. It has also been found in 1,508 of the 4,821 people tested in CDC biomonitoring studies.


Top health concerns for Heptachlor Epoxide (References)

health concern or target organ weight of evidence
Reproduction and fertilityunknown


Results for Heptachlor Epoxide

in blood serum (lipid weight)

Showing results from EWG/Commonweal Study #1, industrial chemicals and pesticides in adults, EWG Study #3, industrial chemicals and pesticides in adults, EWG/Commonweal Study #4, industrial chemicals and pesticides in cord blood, San Francisco Reporter, EWG Study #8, chemicals in mother and 2 children

EWG/Commonweal results

  • geometric mean: 0.257 ng/g (lipid weight) in blood serum
  • found in 16 of 27 people in the group

CDC biomonitoring results

  • geometric mean: 4.45 ng/g (lipid weight) in blood serum
  • found in 1508 of 4821 people in the group
0 ng/g (lipid weight) in blood serum 912


Heptachlor Epoxide results


Detailed toxicity classifications (References)

classification governing entity/references
Reproductive effects - weight of evidence unknown/unassessedDamgaard, I. N., N. E. Skakkebaek, et al. (2006). Persistent pesticides in human breast milk and cryptorchidism. Environ Health Perspect 114(7): 1133-8.