In regards to hazardous substances, how must all containers be handled?

Handling hazardous substances is a critical aspect of ensuring safety in environments where these materials are present. The requirement for all containers to be labeled clearly is vital for several reasons. Proper labeling provides immediate identification of the contents and any associated hazards, allowing individuals to understand the risks involved and take appropriate safety measures.

Clear labels often include essential information such as the chemical name, hazard symbols, handling instructions, and emergency response procedures. This is crucial during emergencies or routine handling, as it minimizes the potential for accidents and ensures that personnel can act quickly and effectively.

In contrast, while sealing containers and storing them in a cool area might be necessary for certain substances to prevent leakage or degradation, these measures do not provide the same level of immediate safety communication as labeling does. Locking containers in a cabinet can enhance security but does not address the fundamental need for awareness and understanding of the hazards associated with the substances themselves. Therefore, clear labeling is the most important requirement for handling hazardous substances.