National Toxicology Program

National Toxicology Program

Process for Preparation of the Report on Carcinogens

The NTP prepares the Report on Carcinogens (RoC) on behalf of the Secretary of Health and Human Services and follows an established, multi-step process for the review and evaluation of selected substances.

On January 11, 2012, the NTP released the process for preparing the RoC [FRN(148 KB)] [Text].

Access Schematic of Process

The Process for Preparation of the Report on Carcinogens is explained in the PDF file with the same name listed above the schematic.


Note on Accessibility: Persons with disabilities or using assistive technology may find some documents are not fully accessible. For assistance, contact us by sending an e-mail message to Central Data Management or to Diane Spencer ( or call 919-541-2759) and identify the documents/pages for which access is required. We will provide assistance in accessing the content of these files for those who need them. You may also find helpful information here.
The NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.