Hazard classification System

A very important information for managing industrial disaster . hazard classification .
HAZARD CLASSIFICATION SYSTEM

The hazard class of dangerous goods is indicated either by its class (or division) number or name.
Placards are used to identify the class or division of a material.
The hazard class or division number must be displayed in the lower corner of a placard and is required for both primary and subsidiary hazard classes and divisions, if applicable.
For other than Class 7 placards, text indicating a hazard (for example, “CORROSIVE”) is not required. Text is shown only in the U.S. The hazard class or division number and subsidiary hazard classes or division numbers placed in parentheses (when applicable), must appear on the shipping document after each proper shipping name.

Class 1 - Explosives
Division 1.1Explosives which have mass explosion hazard
Division 1.2Explosives which have a projection hazard but not a mass explosion hazard
Division 1.3Explosives which have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard
Division 1.4Explosives which present no significant hazard
Division 1.5Very insensitive explosives with a mass explosion hazard
Division 1.6Extremely insensitive articles which do not have a mass explosion hazard

Class 2 - Gases
Division 2.1Flammable gases
Division 2.2Non-flammable, non-toxic* gases
Division 2.3Toxic* gases

Class 3 - Flammable liquids (and Combustible liquids [U.S.])

Class 4 - Flammable solids; Substances liable to spontaneous combustion; Substances which, on contact with water, emit flammable gases
Division 4.1Flammable solids, self-reactive substances and solid desensitized explosives
Division 4.2Substances liable to spontaneous combustion
Division 4.3Substances which in contact with water emit flammable gases

Class 5 - Oxidizing substances and Organic peroxides
Division 5.1Oxidizing substances
Division 5.2Organic peroxides

Class 6 - Toxic* substances and Infectious substances
Division 6.1 Toxic*substancesDivision 6.2Infectious substances

Class 7 - Radioactive materials

Class 8 - Corrosive substances

Class 9 - Miscellaneous dangerous goods/hazardous materials and articles

* The words “poison” or “poisonous” are synonymous with the word “toxic”.

Content collected from various sources . 
Sunand Sampath.