This is the list of extremely hazardous substances defined in Section 302 of the U.S.
Emergency Planning and Community Right-to-Know Act (42 U.S.C. § 11002).
The list can be found as an appendix to 40 CFR 355.
[1] Updates as of 2006 can be seen on the Federal Register, 71 FR 47121 (August 16, 2006).
[2] The data were provided by the United States Environmental Protection Agency (EPA).