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A four-part diamond rating health, fire, reactivity and special hazards.
Also known as: Fire diamond, Hazard diamond
The NFPA 704 diamond rates a material's health, flammability and instability hazards from zero to four in three coloured quadrants, with a fourth for special hazards such as water reactivity. It is designed for emergency responders arriving at a building, not for handling instructions, which is why it differs from GHS labelling.
Rates a stored material's health, flammability and instability from zero to four in three coloured quadrants, with a fourth quadrant for special hazards.
Contexts: Laboratory
Is intended for emergency responders deciding how to approach a building rather than for workers handling the substance, which is why it exists alongside GHS labelling rather than instead of it.
Contexts: Laboratory
A large square standing on one corner divided into four smaller diamonds, three coloured and carrying a numeral and one left plain.