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Tritium (from Ancient Greek τρίτος (trítos) 'third') or hydrogen-3 (symbol T or 3 H) is a rare and radioactive isotope of hydrogen with a half-life of ~12.3 years. The tritium nucleus (t, sometimes called a triton) contains one proton and two neutrons, whereas the nucleus of the common isotope hydrogen-1 (protium) contains one proton and no neutrons, and that of non-radioactive hydrogen ...
UN Number Class Proper Shipping Name UN 2901: 2.3: Bromine chloride: UN 2902: 6.1: Pesticides, liquid, toxic, n.o.s. : UN 2903: 6.1: Pesticides, liquid, toxic ...
(UN number no longer in use) Organometallic compound or Compound solution or Compound dispersion, water-reactive, flammable, n.o.s. (UN number no longer in use) [1] UN 3208 4.3
Phenoxyacetic acid derivative pesticide, liquid, toxic UN 3349: 6.1: Pyrethroid pesticide, solid, toxic UN 3350: 3: Pyrethroid pesticide, liquid, flammable, toxic flash point less than 23 °C UN 3351: 6.1: Pyrethroid pesticide, liquid, toxic, flammable flash point 23 °C or more UN 3352: 6.1: Pyrethroid pesticide, liquid, toxic UN 3353: 9
Isocyanates, toxic, flammable, n.o.s. or Isocyanate solutions, toxic, flammable, n.o.s. flashpoint not less than 23 °C but not more than 61 °C and boiling point less than 300 °C UN 3081 (UN No. no longer in use)
Heavy water can be toxic to humans, but a large amount would be needed for poisoning to occur. The most cost-effective process for producing heavy water is the Girdler sulfide process . Heavy water is used in various industries and is sold in different grades of purity.
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
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]