Given the expanding international market in chemical substances and mixtures, a global system of classification and labeling was proposed at the 1992 Earth Summit by the International Labour Organization, the Organisation for Economic Co-operation and Development and many other governments and stakeholders. In response, the United Nations developed the ‘Globally Harmonised System’ (GHS) which is a single worldwide system for classifying and communicating the hazardous properties of industrial and consumer substances and mixtures.