Dangerous goods, DG for short, are materials that pose a risk to health, safety, property or the environment during transport. Without looking too far, many everyday items can be classified as hazardous materials. Products such as aerosols, magnets, bleach, batteries and accumulators, coolants, adhesives and even perfumes can be hazardous in transit. Each of us knows it from our own experience, for example security checks at the airport before departure. It is a place where our luggage is checked for the content of hazardous materials. Dangerous goods are divided into hazard classes, including: explosive materials and objects, gases, flammable liquids, flammable, toxic and infectious solids, corrosive materials, radioactive materials, various hazardous materials and objects.
Packaging that contains hazardous materials can often be identified by pictograms, most often in the form of a clearly visible diamond. The color of this figure indicates a hazard, e.g. flammability is red and explosive is orange. The non-flammable and non-toxic gas is marked green because all compressed air tanks have this color in France after World War II - this is where the diamond system for identifying hazardous materials was developed.