NFPA 704 Diamond Information: Blue Segment
Blue region - Health Hazard
The blue region of the RTK diamond indicates health hazard and may contain either a 0, 1, 2, 3 or 4. These numbers indicate the level of health exposure risk, and can be interpreted as follows:
More information on the RED NFPA DIAMOND segment
More information on the NFPA DIAMOND YELLOW segment
More information on the NFPA DIAMOND WHITE segment
The blue region of the RTK diamond indicates health hazard and may contain either a 0, 1, 2, 3 or 4. These numbers indicate the level of health exposure risk, and can be interpreted as follows:
- 4 Very short exposure could cause death or major residual injury (e.g., hydrogen cyanide).
- 3 Short exposure could cause serious temporary or residual injury (e.g., chlorine gas).
- 2 Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury (e.g., chloroform).
- 1 Exposure would cause irritation with only minor residual injury (e.g., turpentine).
- 0 Poses no health hazard, no precautions necessary. (e.g., lanolin).