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HSNO classification information

About the HSNO classification system

The HSNO hazard classifications are specified in the Hazardous Substances (Classification) Regulations 2001.

They are represented by:

  1. numbers (identifying the class and subclass of hazard)
  2. a letter (ranking the hazard), and
  3. an associated hazard phrase.

Example: 3.1C Flammable liquids: Medium hazard.

About the classifications and GHS correlations

The HSNO hazard classification system is similar to the United Nations Globally Harmonized System of Classification and Labelling​ of Chemicals (GHS). 

You can read about the correlation between the two classification categories in the infosheet below:

Correlation between GHS and NZ HSNO Hazard Classes and Categories (pdf, 121 kb)


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