NFPA 704 Hazmat color codes:
blue -- health hazard (4 being deadly)
red -- fire hazard (4 being flash point below 73 F)
yellow -- reactivity (4 may detonate) and
white -- specific hazard (no water, radioactive, acid, alkali, corrosive, oxidizer)
red= fire harzard blue= health hazard yellow= reactivity hazard white= special hazard
Fire Hazard: 2, Red square Special Information: 4 Health hazard: 1 Reactivity hazard: 3
3
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
Acetone is assigned a Hazard Guide Number of 30 by the National Fire Protection Association (NFPA). This number indicates the potential health, flammability, and reactivity hazards associated with the substance.
The biological hazard marking is a circle overlaid by 3 linked broken circles. While it identifies something that is alive and dangerous to people, the symbol itself has no meaning.
Right isosceles triangle with a blue background and red lettering
Right isosceles triangle with blue background and red lettering
Right isosceles triangle with a blue background and red lettering
Fragmentation hazard
Yellow 3
Right isosceles triangle with a blue background and red lettering