An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Nominated Substances: 1,3-Dichloro-2-butene
Nomination Date: 03/00/1999
Nominator: NIEHS
Rationale: High production volume; potentially high human exposure; structural similarity to a known carcinogen