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The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
The highest degree of hazard - severe hazard that a very short exposure could cause serious injury or death.
Fire Hazard: 2, Red square Special Information: 4 Health hazard: 1 Reactivity hazard: 3
There are reports that tert-Butyl hydroperoxide has an NFPA 704 rating of 4-4-4, but it is not available in anything over 90 percent concentration, having 2-2-3. If you are ever in a place that needs such stuff, you are strongly urged to find a different job.
2-0-1-ox
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)
300 to 400 degrees per NFPA
NFPA 1002 is the Standard for Driver Operator Professional Qualifications.
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) andwhite -- specific hazard (no water, radioactive, acid, alkali, corrosive, oxidizer)Read more: What_does_the_National_Fire_Protection_Association_704_blue_color_code_stand_for
Health (Blue): 1 Flammability (Red): 2 Reactivity (Yellow): 0 Special (White): None
NFPA codes are enacted selectively, in possibly amended forms, by each state. Similarly, different federal agencies may adopt their own standards or use NFPA standards. For example, OSHA has its own Hazard Communication System (HCS) that is completely different from NFPA 704, using pictograms, being phased in as of December 2013. USDOT also has its own standard for HAZMAT labels (e.g., orange, red, green, yellow, striped, with code numbers and code symbols).
The material can easily release oxygen to create or worsen a fire or explosion hazard