National Toxicology Program

National Toxicology Program

Scientific Review of Environmental Tobacco Smoke

Status: Listed in the Report on Carcinogens (RoC)

Primary Uses or Exposures: Environmental tobacco smoke, a by-product of smoking, is a complex mixture of thousands of chemicals that are emitted from burning tobacco. It is estimated that approximately 9 to 12 million children, aged six and younger, are exposed to environmental tobacco smoke in their homes.

Background Documents

Public Comments


Note on Accessibility: Persons with disabilities or using assistive technology may find some documents are not fully accessible. For assistance, contact Central Data Management or call 919-541-3419 and identify the documents/pages for which access is required. We will assist you in accessing the content of these files. NIEHS has helpful information on accessibility.

NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.