Dichlorodiphenyldichloroethylene (DDE) is a chemical compound formed by the loss of hydrogen chloride (dehydrohalogenation) from DDT, of which it is one of the more common breakdown products.[4] DDE and its parent, DDT, are reproductive toxicants for certain birds species, and major reasons for the decline of the bald eagle,[5] brown pelican[6] peregrine falcon, and osprey.[7] Research shows that an elevated blood levels of DDEs (also of other toxic molecule from nonstick cookware, and fire retardants) have been tied to an increased risk for celiac disease in young people.[10] The biological mechanism for the thinning is not entirely known, but it is believed that p,p'-DDE impairs the hen's gland's ability to excrete calcium carbonate onto the developing egg.[7] Some studies have shown that although DDE levels have fallen dramatically, eggshell thickness remains 10–12 percent thinner than before DDT was first used.
Dichlorodiphenyldichloroethylene
Degradation of DDT to form DDE by an elimination of HCl