What is the most dangerous classes of dangerous goods?

The most dangerous classes of dangerous goods are Class 1 (Explosives), Class 2 (Gases), Class 3 (Flammable Liquids), Class 4 (Flammable Solids), Class 5 (Oxidizing Substances and Organic Peroxides), Class 6 (Toxic and Infectious Substances), Class 7 (Radioactive Material), Class 8 (Corrosives), and Class 9 (Miscellaneous Dangerous Goods). Among these, Class 1 and Class 7 are often considered the most hazardous due to their potential for catastrophic incidents or long-term health risks. Proper handling, storage, and transportation protocols are essential to minimize the risks associated with these materials.