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  2. Hydrogen safety - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_safety

    The Hindenburg disaster is an example of a large hydrogen explosion. Hydrogen safety covers the safe production, handling and use of hydrogen, particularly hydrogen gas fuel and liquid hydrogen. Hydrogen possesses the NFPA 704's highest rating of four on the flammability scale because it is flammable when mixed even in small amounts with ...

  3. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    Highly toxic to humans in its elemental form. [11] iridium: 77: 1a: Due to its extreme rarity, iridium has no biological role. [11] The chloride is moderately toxic to humans. [11] iron: 26: 5: Essential to almost all living things, usually as a ligand in a protein; it is most familiar as an essential element in the protein hemoglobin. [11 ...

  4. List of highly toxic gases - Wikipedia

    en.wikipedia.org/wiki/List_of_highly_toxic_gases

    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.

  5. Indiana plastics fire spewed toxic chemicals, EPA tests find ...

    www.aol.com/news/indiana-plastics-fire-spewed...

    Hydrogen cyanide, a highly toxic gas, can be fatal depending on the dose and length of exposure. Benzene is known to cause cancers such as leukemia, multiple myeloma and non-Hodgkin lymphoma in ...

  6. Cyanide poisoning - Wikipedia

    en.wikipedia.org/wiki/Cyanide_poisoning

    Hydrogen cyanide gas was strongly suspected. [85] [86] In 1995, a device was discovered in a restroom in the Kayabachō Tokyo subway station, consisting of bags of sodium cyanide and sulfuric acid with a remote controlled motor to rupture them, in what was believed to be an attempt by the Aum Shinrikyo cult to produce toxic amounts of hydrogen ...

  7. Hydrogen - Wikipedia

    en.wikipedia.org/wiki/Hydrogen

    Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H 2, sometimes called dihydrogen, [11] but more commonly called hydrogen gas, molecular hydrogen or simply hydrogen. It is colorless, odorless, [12] non-toxic, and highly ...

  8. Hydrogen sulfide - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_sulfide

    Hydrogen sulfide is toxic to humans and most other animals by inhibiting cellular respiration in a manner similar to hydrogen cyanide. When it is inhaled or its salts are ingested in high amounts, damage to organs occurs rapidly with symptoms ranging from breathing difficulties to convulsions and death.

  9. Bottled water contains harmful contaminants, experts warn ...

    www.aol.com/lifestyle/bottled-water-contains...

    Bottled water may not be safer than tap. But many people think it is. In much of the U.S. — and other wealthy nations — tap water is tightly regulated, frequently tested and “often exceeds ...

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