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"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 ...
W, W, <s>W</s> Special hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid code S: W+OX, WOX: Special hazard W+OX: Reacts with water in an unusual or dangerous manner AND is oxidizer code S: ACID: Special hazard ACID: Acid code S: ALK: Special hazard ALK: Alkaline code S: BIO: Special hazard BIO: Biohazardous.
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.
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.
NFPA 704 Safety Square: To quickly and easily identify the risks posed by hazardous materials Emergency response personnel Currently used in the US Hazardous Materials Identification System: A numerical hazard rating used to identify the risks posed by hazardous materials Employers and workers who handle and are exposed to hazardous chemicals
This template produces a NFPA 704 safety square with optionally four hazard codes. It is designed to be used in a table. It is designed to be used in a table. Primary use is through {{ Chembox }} , the {{ NFPA 704 }} box and {{ OrganicBox complete }} (chemical data pages).
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Class IB liquids with a flash point less than 73 °F (23 °C) and a boiling point equal to or greater than 100 °F (38 °C) and class IC liquids with a flash point equal to or greater than 73 °F (23 °C), but less than 100 °F (38 °C) have a NFPA 704 flammability rating of 3