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  2. NFPA 704 - Wikipedia

    en.wikipedia.org/wiki/NFPA_704

    "NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association. First "tentatively adopted as a guide" in 1960, [ 1 ] and revised several times since then, it defines the " Safety Square " or " Fire Diamond " which is used to ...

  3. Hazardous Materials Identification System - Wikipedia

    en.wikipedia.org/wiki/Hazardous_Materials...

    The number ratings range from 0 to 4. ... The health rating varies from NFPA 704, as a worker using a chemical daily has a different exposure over time compared to a ...

  4. Hazard symbol - Wikipedia

    en.wikipedia.org/wiki/Hazard_symbol

    A chemical hazard symbol is a pictogram applied to containers and storage areas of dangerous chemical compounds to indicate the specific hazard, and thus the required precautions. There are several systems of labels, depending on the purpose, such as on the container for transportation, containers for end-use, or on a vehicle during transportation.

  5. List of UN numbers 1201 to 1300 - Wikipedia

    en.wikipedia.org/wiki/List_of_UN_numbers_1201_to...

    n.o.s. = not otherwise specified meaning a collective entry to which substances, mixtures, solutions or articles may be assigned if a) they are not mentioned by name in 3.2 Dangerous Goods List AND b) they exhibit chemical, physical and/or dangerous properties corresponding to the Class, classification code, packing group and the name and description of the n.o.s. entry [4]

  6. 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.

  7. GHS hazard pictograms - Wikipedia

    en.wikipedia.org/wiki/GHS_hazard_pictograms

    Note: The asterisks are replaced by the class number and compatibility code Divisions 1.1–1.3 Explosives – Substances and articles which are classified as explosives but which present no significant hazard Note: The asterisk is replaced by the compatibility code Division 1.4

  8. UN number - Wikipedia

    en.wikipedia.org/wiki/UN_number

    A United States placard showing the UN number 1814, indicating potassium hydroxide solution, on a railroad tank car.. A UN number (United Nations number) is a four-digit number that identifies hazardous materials, and articles (such as explosives, flammable liquids, oxidizers, toxic liquids, etc.) in the framework of international trade and transport.

  9. GHS hazard statements - Wikipedia

    en.wikipedia.org/wiki/GHS_hazard_statements

    Globally Harmonized System of Classification and Labelling of Chemicals (Fourth revised ed.), New York and Geneva: United Nations, 2011, ISBN 978-92-1-117042-9, ST/SG/AC.10/30/Rev.2 ("GHS Rev.4") Globally Harmonized System of Classification and Labelling of Chemicals (Second revised ed.),

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