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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. Hazard symbol - Wikipedia

    en.wikipedia.org/wiki/Hazard_symbol

    NFPA 704 standard hazard sticker or placard. The US-based National Fire Protection Association (NFPA) has a standard NFPA 704 using a diamond with four colored sections each with a number indicating severity 0–4 (0 for no hazard, 4 indicates a severe hazard). [31]

  4. HAZMAT Class 5 Oxidizing agents and organic peroxides

    en.wikipedia.org/wiki/HAZMAT_Class_5_Oxidizing...

    An oxidizer is a material that may, generally by yielding oxygen, cause or enhance the combustion of other materials. A solid material is classed as a Division 5.1 material if, when tested in accordance with the UN Manual of Tests and Criteria, its mean burning time is less than or equal to the burning time of a 3:7 potassium bromate /cellulose ...

  5. HAZMAT Class 2 Gases - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_2_Gases

    B: For domestic shipments of compressed oxygen, or refrigerated liquid oxygen the "Oxygen" placard may be used instead of a "Non-flammable Gas" placard. See §172.504(f)(7). See §172.504(f)(7). Source: United States Code of Federal Regulations, Title 49 CFR §177.848 - Segregation of hazardous materials.

  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. Placard - Wikipedia

    en.wikipedia.org/wiki/Placard

    A NFPA 704 symbol for Acetone. NFPA 704 is a standard developed by the National Fire Protection Association for warning first responders to hazards posed by hazardous materials stored in a building or facility. The signs are intended to be mounted on the exteriors of buildings, storage tanks and storage areas.

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