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The NFPA 704 diamond is a ring of smaller diamonds that are blue, red, yellow and white. A number or symbol in each section indicates the relative danger.
Cyclohexane does not have a specific NFPA diamond classification since it is not considered a hazardous material under the NFPA 704 standard.
The first guide is from 1960.
0-0-0
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
Potential dangers.
A "4" in the blue quadrant of NFPA 704 indicates that the substance is known to be highly hazardous to an individual's health. The scale runs from 0 to 4 with 0 being essentially harmless and 4 being extremely harmful or potentially fatal. The number 4 means it is too dangerous to enter the liquid or vapor, as compared with number 3, which means you can work with it if you are fully protected.
Health (blue) 2 Fire (red) 0 Reactivity (yellow) 0
No. 704 is a composite number.
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.
It is the yellow section.