Definition and Citations:
Transport recommendations for dangerous goods. Class 1-explosives, Class 2- gases, Class-3 flammable liquids, Class 4-flammable solids, Class5-Infectious and toxic substances, Class 6-organic peroxides and oxidant substances, Class7-radioactive material, Class 8- Corrosive substances, Class9- miscellaneous dangerous substances. Developed by the UN in 1957.
