Hazchem Code - Quick Interpretation of the code

Interpretation of the HAZCHEM Codes in the field is achieved by the use of a simple scale. This scale is in four parts:

• A diagram showing the relative position of the HAWHEM Code, United Nations number of the dangerous substances and dangerous substances Class label as they appear on the Emergency Information Panels (E1Ps) fitted to bulk dangerous substances transport vehicles.

• A key to the second and third alphabetic character.


• A key to the numeric characters indicating the combating medium.


• The alphabetic characters relate to information regarding the possibility of violent reaction, indicated in the second column by the letter V in the third column the type of personal protection required and in the final column indicating whether a spillage should be contained or diluted.