1. UN Number: This is a four-digit code that identifies the hazardous material. It is assigned by the United Nations and can be used to look up more detailed information about the material's properties and hazards.
2. Proper Shipping Name: This is the official name of the hazardous material, according to the United Nations. It is used to ensure that everyone involved in the transportation of the material is aware of its hazards.
3. Hazard Class: This number indicates the primary hazard associated with the material. There are nine different hazard classes, including:
* Class 1: Explosives
* Class 2: Gases
* Class 3: Flammable liquids
* Class 4: Flammable solids
* Class 5: Oxidizers
* Class 6: Toxic and infectious substances
* Class 7: Radioactive materials
* Class 8: Corrosives
* Class 9: Miscellaneous dangerous goods
4. Division: This number further specifies the hazard within a hazard class. For example, within the flammable liquids class, there are divisions for gasoline, diesel fuel, and other flammable liquids.
5. Subsidiary Hazards: These are additional hazards associated with the material, besides the primary hazard indicated by the hazard class. For example, a material may be both flammable and toxic, or it may be corrosive and oxidizing.
6. Emergency Response Guide Number: This number refers to a specific section in the Emergency Response Guidebook (ERG), which provides guidance on how to respond to an accident or spill involving the hazardous material.
7. Contact Information: This provides the name and phone number of the person or organization to contact in case of an emergency involving the hazardous material.
The proper use and display of placards on tankers carrying hazardous materials are critical for ensuring the safety of the public and those involved in the transportation of these materials.