ERG
Class 3
Flammable liquids
Class 4
Flammable solids
Class 2
Gases
NFPA 704 placard (Blue)
Health
What does the white pages stand for?
How to use the ERG, resource telephone numbers, pictures of highway and rail vehicles and intermodal container marking.
What does the yellow pages stand for?
ID Number Index Numerical listing by 4-digit UN/NA numbers
What does the green pages stand for?
Initial isolation and protective action distances and water reactive chemicals
NFPA 704 placard (yellow)
Instability/Reactivity
Class 8
Corrosive substances
Class 1
Explosives
NFPA 704 Placard (Red)
Flammability
Class 9
Miscellaneous
What does the blue pages stand for?
Name of material Alphabetical listing by chemical names (not trade names)
What does the orange pages stand for?
Number Guide The "guide pages" themselves
Class 5
Oxidizing substances and Organic peroxides
What does the pictures of placards mean?
Provide a Guide Page number when only a general placard or hazard is known
Class 7
Radioactive materials
NFPA 704 placard (White)
Special information
What does words highlighted in green mean?
TIH ( toxic inhalation hazard)
Class 6
Toxic substances and infectious substances