Polybrominated Biphenyls (PBBs)

CAS ID#: 67774-32-7, 32536-52-0, 1163-19-5, 32534-81-9

Affected Organ Systems: Body Weight, Cancer, Dermal (Skin), Developmental (effects while organs are developing), Endocrine (Glands and Hormones), Gastrointestinal (Stomach and Intestines, part of the digestive system), Hepatic (Liver), Immunological (Immune System), Neurological (Nervous System), Renal (Urinary System or Kidneys)

Cancer Classification:  Please contact NTP, IARC, or EPA with questions on cancer and cancer classification.

Chemical Classification: Dioxins, Furans, PCBs (contain phenyl rings of carbon atoms), Phenols/phenoxy acids


Polybrominated biphenyls (PBBs) are manufactured chemicals. They are added to the plastics used to make products like computer monitors, televisions, textiles, plastic foams, etc. to make them difficult to burn. PBBs can leave these plastics and find their way into the environment. PBBs are usually colorless to off-white solids. PBBs are mixtures of brominated biphenyl compounds known as congeners.

In the United States, manufacturing of PBBs was stopped in 1976. PBBs are still around in the environment because they do not degrade easily or quickly.

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Public Health Statement - Summary about a hazardous substance taken from Chapter One of its respective ATSDR Toxicological Profile.

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Toxicological Profile - Succinctly characterizes the toxicologic and adverse health effects information for a hazardous substance.

Page last reviewed: February 10, 2021