Health (Blue): 1
Flammability (Red): 2
Reactivity (Yellow): 0
Special (White): None
That would depend upon the health, flammability and reactivity of the particular solvent. For instance, water is a solvent and has rating 0,0,0 on the NFPA 704 diamond.
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
2-0-1-ox
Fire Hazard: 2, Red square Special Information: 4 Health hazard: 1 Reactivity hazard: 3
0-0-0
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.
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.
It depends what you mean. You should not ingest it. It is a skin irritant and on a NFPA 704 diamond, it is given a 3 for health hazard, meaning it can cause serious short term injury. "Short exposure could cause serious temporary or moderate residual injury (e.g., chlorine)." Now, you could be asking about phosphoric acid, and that is a food additive. It also has a NFPA rating of 3, but in beverages, it is diluted. There is some controversy about how healthy this is. It can be linked to kidney disease, tooth decay, and lower bone density.
If an NFPA 704 Fire Diamond has a 2 in the yellow section it means the reactivity of the material is such that it can have violent chemical change at high temperature or pressure, it can react violently with water, or it can form explosive mixtures with water.
The highest degree of hazard - severe hazard that a very short exposure could cause serious injury or death.
The NPFA mark is used for materials that can ignite.
The NFPA 704 symbol is red, blue, yellow and white. Red code is "flammability" Blue code is "health" danger Yellow code is "instability" White is for "special hazards" such as "do not wet" and "oxidizer"
Health (blue) 2 Fire (red) 0 Reactivity (yellow) 0