Highly Flammable Substances A substance which may become hot and catch fire in contact with air, or a solid which may readily catch fire after brief contact with a source of ignition, is gaseous and flamable in air or is a liquid with a low flash point (<21 C).
	Corrosive Substance A substance which on contact with human tissue destroys them.
	Explosive Substance A substance which may explode under the affect of a flame.
	Oxidising Substance A substance which gives rise to a highly exothermic reaction when in contact with other substances.
	Radioactive Substance A substance which emmits harmful radiation.
	Toxic or Very Toxic Substance A substance which if inhaled, ingested or penetrates the skin may involve acite or chronic health risks and even death.
	Irritating Substance A non-corrosive substance which through immediate, prolonged or repeated contact with the skin or mucous membrane, can cause inflamation.
	Harmfull Substance A substance which if inhaled, ingested or penetrates the skin may involve limited health risks.
	Dangerous for the Environment Substance A substance which may can cause environmental and ecological damage to the environment.