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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]
Toxic: a chemical that has a median lethal concentration (LC 50) in air of more than 200 parts per million (ppm) but not more than 2,000 parts per million by volume of gas or vapor, or more than 2 milligrams per liter but not more than 20 milligrams per liter of mist, fume or dust, when administered by continuous inhalation for 1 hour (or less if death occurs within 1 hour) to albino rats ...
The Schedule 3 list is one of three lists. Chemicals which can be used as weapons, or used in their manufacture, but which have no, or almost no, legitimate applications as well are listed in Schedule 1, whilst Schedule 2 is used for chemicals which have legitimate small-scale applications. The use of Schedule 1, 2, or 3 chemicals as weapons is ...
It possesses a chemical structure closely related to that of other toxic chemicals listed in Schedule 1, and has, or can be expected to have, comparable properties; It possesses such lethal or incapacitating toxicity as well as other properties that would enable it to be used as a chemical weapon;
The Lists themselves are divided into part A with toxic substances that can be used directly as chemical weapons and part B containing their precursors (chemicals with which those substances can be made). The Lists are subject to the following criteria, among others: [2] [3] Schedule 1 [4] contains substances most clearly related to a chemical ...
Schedule 2 lists toxic chemicals and precursors – not listed in Schedule 1 – that are deemed to pose a significant risk to be used as a chemical weapon, or may be important for the production of any of the chemicals listed in Schedule 1.