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