A container of flammable solids within the U.N. system receives which hazard classification number?

• A. 1
• B. 2
• C. 4
• D. 5

Answer: (C)

Flammable solids are classified within the United Nations (U.N.) system based on their ability to ignite and burn readily. The classification number assigned to flammable solids is 4, which indicates that these materials have the potential to catch fire through friction, absorption of moisture, or during transport, with an elevated risk of a fire hazard in the presence of heat or sparks.

This classification encompasses various substances that can spontaneously ignite or are capable of combustion in specific conditions, highlighting the importance of their management and proper containment during transport. The classification number provides crucial information for emergency responders and transport personnel regarding the handling, storage, and safety measures required when dealing with such hazardous materials. Understanding this classification is essential for compliance with safety regulations and for ensuring the safe transport and handling of flammable solids.