Hazardous substances must be classified in accordance with the rules of the Ministry for Energy and the Environment.
Explosive, flammable or environmentally hazardous substances and products, or substances and products which are hazardous to health are divided into hazard classes and are labelled as shown on page 98:
The present orange hazard symbols are about to be replaced by new labelling system. Mixtures/products labelled with both the old and the new labels can be seen at work sites during a transitional period up until June 2017.
Only products with the new hazard symbols may be used after 2017. In the case of pure chemical products, all substances must be labelled with new pictograms.