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2. EPA list of extremely hazardous substances - Wikipedia

   en.wikipedia.org/wiki/EPA_list_of_extremely...

   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]

3. Toxicity category rating - Wikipedia

   en.wikipedia.org/wiki/Toxicity_category_rating

   In 40 CFR 156.62, the EPA established four Toxicity Categories for acute hazards of pesticide products, with "Category I" being the highest toxicity category (toxicity class). Most human hazard, precautionary statements, and human personal protective equipment statements are based upon the Toxicity Category of the pesticide product as sold or ...

4. Emergency Planning and Community Right-to-Know Act

   en.wikipedia.org/wiki/Emergency_Planning_and...

   The Environmental Protection Agency (EPA) has published a list of "extremely hazardous substances (EHS)." For each EHS, the list includes the name, the Chemical Abstract Service number of the substance, and a number called a threshold planning quantity (TPQ). The TPQ, expressed in pounds, is the critical number.

5. National Priorities List - Wikipedia

   en.wikipedia.org/wiki/National_Priorities_List

   The Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), also known as "Superfund", requires that the criteria provided by the Hazard Ranking System (HRS) be used to make a list of national priorities of the known releases or threatened releases of hazardous substances, pollutants, or contaminants in the United States. [2]

6. EPA may list PFAS as hazardous substance - AOL

   www.aol.com/epa-may-list-pfas-hazardous...

   Feb. 3—SANTA FE — The U.S. Environmental Protection Agency on Thursday announced two proposed rules "to ensure that certain per- and polyfluoroalkyl substances (PFAS), also known as 'forever ...

7. Toxicity class - Wikipedia

   en.wikipedia.org/wiki/Toxicity_class

   Class III: slightly hazardous The system is based on LD50 determination in rats, thus an oral solid agent with an LD50 at 5 mg or less/kg bodyweight is Class Ia, at 5–50 mg/kg is Class Ib, LD50 at 50–2000 mg/kg is Class II, and at LD50 at the concentration more than 2000 mg/kg is classified as Class III.

8. EPA proposes some ‘forever chemicals’ be considered hazardous

   www.aol.com/epa-proposes-forever-chemicals...

   Under EPA regulations, to be considered a “hazardous constituent,” studies must show that the chemical is a threat to human health or “other life forms” and demonstrate that the chemical ...

9. Category:Chemical compounds - Wikipedia

   en.wikipedia.org/wiki/Category:Chemical_compounds

   Download as PDF; Printable version; In other projects ... Chemical classes of psychoactive drugs (21 C, 25 P) ... EPA list of extremely hazardous substances; G.