• Flammable gases and liquids (such as LPG, propane gas and petrol);
• Combustible liquids (such as diesel fuel);
• Gases kept under pressure (such as helium and nitrogen); and,
• Corrosive substances (such as bleach and caustic soda).

The requirements that apply to the use, handling and storage of dangerous substances are intended to ensure that risks to health and safety are properly managed. The Dangerous Substances Act 2004 sets out a general safety duty that applies to everyone, including householders, and additional safety duties that apply where a dangerous substance is used, stored or handled for a business or undertaking. New requirements for the use, handling and storage of dangerous substances will take effect from 29 March 2018 as part of the introduction of the Globally Harmonised System of Classification and Labelling of Chemicals (GHS).