Dangerous goods are classified in following 9 categories depending upon the harmful element they carry.
They are as mentioned below:
3. Flammable solids
4. Flammable liquids
5. Oxidizing substances
6. Toxic and infectious substances
7. Radioactive material
9. Miscellaneous dangerous materials
The transportation, storage and disposal of dangerous goods have to be very controlled. There are regulations in place regarding how to carry these goods; depending upon which category they belong. The major regulations regarding their transportation are UN recommendations on transport of dangerous goods, ICAO’s technical instructions, IMO’s International Maritime Dangerous Goods code etc.
Proper packaging and labeling are also important aspect of transportation and storage of dangerous goods. Labels include different diagrams in different colors for each categories and subcategories. There are 3 packaging groups: group I, II and III that denotes high, medium and low level of risk associated with hazardous material to be packed.
Example: Under UN regulations, Anhydrous ammonia is classified under toxic gas category i.e. category 2.3 and represented as: