The first version of the GHS document (also was called the “Purple Book”), was adopted in December by the United Nation (UN) Sub-Committee on the. UNITAR/ILO Global GHS Capacity Building Programme: provides training on Understanding the GHS: A Companion Guide to the Purple Book;; A GHS. The UN GHS Purple Book is a guidance document published by the United Nations on the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). There are thousands of pages in the UN GHS Purple Book. Update History of the UN GHS Purple Book and Download.


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This includes providing standard mechanisms for determining whether a chemical or product is hazardous, establishing standard definitions purple book ghs pictograms, and setting the criteria for creating GHS labels and Safety Data Sheets.

You could say the GHS Purple Book provides the regulatory building blocks that are the foundation of national programs that address classification of chemical hazards, and the transmittal of information about those hazards and their associated protective measures.

GHS (Rev.7) (2017)

It was recognized that an internationally harmonized approach to classification and labeling would provide the foundation for all countries to develop compatible, comprehensive national programs to ensure the purple book ghs use of chemicals.

The ILO concluded that there were four major existing systems that needed to be harmonized to achieve a global approach. UN Transport Recommendations U. It provides the standards used to harmonize hazard classification and communication around the world.

They are required to: The GHS is a system for standardizing and harmonizing the classification and labeling of chemicals. Its purpose is to purple book ghs a logical and comprehensive approach to: Establishing consistent definitions of the physical, health, and environmental hazards of chemicals.

Create classification processes that purple book ghs existing chemical data to classify chemicals based on standard hazard criteria. Communicate chemical hazard information, as well as protective measures, on labels and Safety Data Sheets SDS using a consistent and uniform format, terminology, descriptions, and pictograms.

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The first step is to classify chemicals and substances based on the standard hazard definitions in the GHS Purple Book. Because in most cases purple book ghs GHS Purple Book categories are clear and distinct, users can self-classify most chemicals.


A decision tree approach, provided in the GHS Purple Book, helps to simplify the classification process. However, purple book ghs a few cases the GHS criteria are semi-quantitative, or even qualitative.

That means that classifying chemicals that are in those categories generally will require an expert understands the hazards and can interpret the data.

The normal classification process involves looking at the intrinsic hazardous properties of substances and mixtures, and following three steps: Identification of the relevant data regarding the substance's hazards.

The data may be obtained from tests, literature, and practical experience. The same chemical hazards are sometimes classified and communicated in different ways purple book ghs different countries. As a result, workers, consumers, and the environment are not uniformly protected.

GHS hazard pictograms The GHS purple book ghs an internationally-agreed system that provides countries with the regulatory building blocks to develop or modify existing national programmes.


It sets criteria for the classification of chemical hazards and offers protective measures through labels and safety data sheets.

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